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20044257 = 36681419
BaseRepresentation
bin100110001110…
…1100111100001
31101201100112220
41030131213201
520112404012
61553341253
7332242032
oct114354741
941640486
1020044257
1110350602
126867829
1341ca60c
14293aa89
151b5e08c
hex131d9e1

20044257 has 4 divisors (see below), whose sum is σ = 26725680. Its totient is φ = 13362836.

The previous prime is 20044243. The next prime is 20044303. The reversal of 20044257 is 75244002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20044257 - 214 = 20027873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20044237) 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 3 ways as a sum of consecutive naturals, for example, 3340707 + ... + 3340712.

It is an arithmetic number, because the mean of its divisors is an integer number (6681420).

Almost surely, 220044257 is an apocalyptic number.

It is an amenable number.

20044257 is a deficient number, since it is larger than the sum of its proper divisors (6681423).

20044257 is an equidigital number, since it uses as much as digits as its factorization.

20044257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681422.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20044257 is about 4477.0813037067. The cubic root of 20044257 is about 271.6418341226.

Adding to 20044257 its reverse (75244002), we get a palindrome (95288259).

It can be divided in two parts, 20044 and 257, that added together give a triangular number (20301 = T201).

The spelling of 20044257 in words is "twenty million, forty-four thousand, two hundred fifty-seven".

Divisors: 1 3 6681419 20044257