20264256 has 84 divisors (see below), whose sum is σ = 60281312. Its totient is φ = 6749568.

The previous prime is 20264249. The next prime is 20264263. The reversal of 20264256 is 65246202.

It is an interprime number because it is at equal distance from previous prime (20264249) and next prime (20264263).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14901 + ... + 16203.

Almost surely, 2^20264256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20264256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30140656).

20264256 is an abundant number, since it is smaller than the sum of its proper divisors (40017056).

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

20264256 is an equidigital number, since it uses as much as digits as its factorization.

20264256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1308 counting only the distinct ones).

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

The square root of 20264256 is about 4501.5837213141. The cubic root of 20264256 is about 272.6320365657.

The spelling of 20264256 in words is "twenty million, two hundred sixty-four thousand, two hundred fifty-six".