20256268 has 48 divisors (see below), whose sum is σ = 39029760. Its totient is φ = 9172800.

The previous prime is 20256263. The next prime is 20256281. The reversal of 20256268 is 86265202.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 154563 + ... + 154693.

It is an arithmetic number, because the mean of its divisors is an integer number (813120).

Almost surely, 2^20256268 is an apocalyptic number.

It is an amenable number.

20256268 is a deficient number, since it is larger than the sum of its proper divisors (18773492).

20256268 is a wasteful number, since it uses less digits than its factorization.

20256268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20256268 is about 4500.6963905600. The cubic root of 20256268 is about 272.5962087691.

The spelling of 20256268 in words is "twenty million, two hundred fifty-six thousand, two hundred sixty-eight".