20925738 has 12 divisors (see below), whose sum is σ = 45339138. Its totient is φ = 6975240.

The previous prime is 20925701. The next prime is 20925739. The reversal of 20925738 is 83752902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 1238769 = 4437^2 + 1113^2 .

It is not an unprimeable number, because it can be changed into a prime (20925739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581253 + ... + 581288.

Almost surely, 2^20925738 is an apocalyptic number.

20925738 is an abundant number, since it is smaller than the sum of its proper divisors (24413400).

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

20925738 is a wasteful number, since it uses less digits than its factorization.

20925738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162549 (or 1162546 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20925738 is about 4574.4658704596. The cubic root of 20925738 is about 275.5668220646.

The spelling of 20925738 in words is "twenty million, nine hundred twenty-five thousand, seven hundred thirty-eight".