20268728 has 16 divisors (see below), whose sum is σ = 38054880. Its totient is φ = 10120768.

The previous prime is 20268701. The next prime is 20268733. The reversal of 20268728 is 82786202.

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, 7676 + ... + 9972.

It is an arithmetic number, because the mean of its divisors is an integer number (2378430).

Almost surely, 2^20268728 is an apocalyptic number.

It is an amenable number.

20268728 is a deficient number, since it is larger than the sum of its proper divisors (17786152).

20268728 is a wasteful number, since it uses less digits than its factorization.

20268728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3402 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20268728 is about 4502.0804079892. The cubic root of 20268728 is about 272.6520902798.

The spelling of 20268728 in words is "twenty million, two hundred sixty-eight thousand, seven hundred twenty-eight".