20264728 has 16 divisors (see below), whose sum is σ = 41450760. Its totient is φ = 9211200.

The previous prime is 20264719. The next prime is 20264737. The reversal of 20264728 is 82746202.

It is an interprime number because it is at equal distance from previous prime (20264719) and next prime (20264737).

It is a self number, because there is not a number n which added to its sum of digits gives 20264728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115053 + ... + 115228.

Almost surely, 2^20264728 is an apocalyptic number.

It is an amenable number.

20264728 is an abundant number, since it is smaller than the sum of its proper divisors (21186032).

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

20264728 is a wasteful number, since it uses less digits than its factorization.

20264728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230298 (or 230294 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20264728 is about 4501.6361470026. The cubic root of 20264728 is about 272.6341532865.

The spelling of 20264728 in words is "twenty million, two hundred sixty-four thousand, seven hundred twenty-eight".