20256264 has 64 divisors (see below), whose sum is σ = 64310400. Its totient is φ = 5787072.

The previous prime is 20256263. The next prime is 20256281. The reversal of 20256264 is 46265202.

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

It is not an unprimeable number, because it can be changed into a prime (20256263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5187 + ... + 8210.

It is an arithmetic number, because the mean of its divisors is an integer number (1004850).

Almost surely, 2^20256264 is an apocalyptic number.

20256264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20256264 is an abundant number, since it is smaller than the sum of its proper divisors (44054136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20256264 is a wasteful number, since it uses less digits than its factorization.

20256264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13419 (or 13409 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20256264 is about 4500.6959461843. The cubic root of 20256264 is about 272.5961908259.

The spelling of 20256264 in words is "twenty million, two hundred fifty-six thousand, two hundred sixty-four".