20925089616025 has 45 divisors (see below), whose sum is σ = 30271449820703. Its totient is φ = 14347864381200.

The previous prime is 20925089616023. The next prime is 20925089616037. The reversal of 20925089616025 is 52061698052902.

The square root of 20925089616025 is 4574395.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7533032261769 + 13392057354256 = 2744637^2 + 3659516^2 .

It is not a de Polignac number, because 20925089616025 - 2¹ = 20925089616023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20925089616023) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1120717440 + ... + 1120736110.

Almost surely, 2^{20925089616025} is an apocalyptic number.

20925089616025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20925089616025 is the 4574395-th square number.

20925089616025 is the 2287198-th centered octagonal number.

It is an amenable number.

20925089616025 is a deficient number, since it is larger than the sum of its proper divisors (9346360204678).

20925089616025 is an frugal number, since it uses more digits than its factorization.

20925089616025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37380 (or 18683 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 20925089616025 in words is "twenty trillion, nine hundred twenty-five billion, eighty-nine million, six hundred sixteen thousand, twenty-five".