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20359997 = 717916249
BaseRepresentation
bin100110110101…
…0101100111101
31102022101122222
41031222230331
520203004442
62004215125
7335025410
oct115525475
942271588
1020359997
1110546849
12699a4a5
1342ab248
1429bdb77
151bc28d2
hex136ab3d

20359997 has 8 divisors (see below), whose sum is σ = 23400000. Its totient is φ = 17352864.

The previous prime is 20359993. The next prime is 20360017. The reversal of 20359997 is 79995302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20359997 - 22 = 20359993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20359993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6872 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (2925000).

Almost surely, 220359997 is an apocalyptic number.

It is an amenable number.

20359997 is a deficient number, since it is larger than the sum of its proper divisors (3040003).

20359997 is a wasteful number, since it uses less digits than its factorization.

20359997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16435.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 20359997 is about 4512.2053366397. The cubic root of 20359997 is about 273.0607234761.

The spelling of 20359997 in words is "twenty million, three hundred fifty-nine thousand, nine hundred ninety-seven".

Divisors: 1 7 179 1253 16249 113743 2908571 20359997