20925704 has 16 divisors (see below), whose sum is σ = 40589100. Its totient is φ = 10101952.

The previous prime is 20925701. The next prime is 20925739. The reversal of 20925704 is 40752902.

It can be written as a sum of positive squares in 2 ways, for example, as 20884900 + 40804 = 4570^2 + 202^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (20925701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44867 + ... + 45330.

Almost surely, 2^20925704 is an apocalyptic number.

It is an amenable number.

20925704 is a deficient number, since it is larger than the sum of its proper divisors (19663396).

20925704 is a wasteful number, since it uses less digits than its factorization.

20925704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90232 (or 90228 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20925704 is about 4574.4621541773. The cubic root of 20925704 is about 275.5666728181.

The spelling of 20925704 in words is "twenty million, nine hundred twenty-five thousand, seven hundred four".