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20253807 = 31073
BaseRepresentation
bin100110101000…
…0110001101111
31102010000000000
41031100301233
520141110212
62002035343
7334104000
oct115206157
942100000
1020253807
1110483a92
126948b53
134271b02
1429931a7
151ba11dc
hex1350c6f

20253807 has 44 divisors (see below), whose sum is σ = 35429200. Its totient is φ = 11573604.

The previous prime is 20253799. The next prime is 20253811. The reversal of 20253807 is 70835202.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an ABA number since it can be written as A⋅BA, here for A=3, B=189.

It is not a de Polignac number, because 20253807 - 23 = 20253799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 2893398 + ... + 2893404.

Almost surely, 220253807 is an apocalyptic number.

20253807 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20253807 is a deficient number, since it is larger than the sum of its proper divisors (15175393).

20253807 is an frugal number, since it uses more digits than its factorization.

20253807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20253807 is about 4500.4229801209. The cubic root of 20253807 is about 272.5851687881.

It can be divided in two parts, 2025 and 3807, that added together give a cube (5832 = 183).

The spelling of 20253807 in words is "twenty million, two hundred fifty-three thousand, eight hundred seven".

Divisors: 1 3 7 9 21 27 49 63 81 147 189 243 343 441 567 729 1029 1323 1701 2187 3087 3969 5103 6561 9261 11907 15309 19683 27783 35721 45927 59049 83349 107163 137781 250047 321489 413343 750141 964467 2250423 2893401 6751269 20253807