20868496922025 has 81 divisors (see below), whose sum is σ = 38419978140453. Its totient is φ = 10827742219200.

The previous prime is 20868496922011. The next prime is 20868496922057. The reversal of 20868496922025 is 52022969486802.

The square root of 20868496922025 is 4568205.

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

20868496922025 is a `hidden beast` number, since 20 + 86 + 8 + 496 + 9 + 2 + 20 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1981059065001 + 18887437857024 = 1407501^2 + 4345968^2 .

It is not a de Polignac number, because 20868496922025 - 2²⁵ = 20868463367593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2535349660 + ... + 2535357890.

Almost surely, 2^{20868496922025} is an apocalyptic number.

20868496922025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20868496922025 is the 4568205-th square number.

20868496922025 is the 2284103-rd centered octagonal number.

It is an amenable number.

20868496922025 is a deficient number, since it is larger than the sum of its proper divisors (17551481218428).

20868496922025 is an frugal number, since it uses more digits than its factorization.

20868496922025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16552 (or 8276 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 20868496922025 in words is "twenty trillion, eight hundred sixty-eight billion, four hundred ninety-six million, nine hundred twenty-two thousand, twenty-five".