20372810640625 has 21 divisors (see below), whose sum is σ = 25466392600221. Its totient is φ = 16297797150000.

The previous prime is 20372810640551. The next prime is 20372810640643. The reversal of 20372810640625 is 52604601827302.

The square root of 20372810640625 is 4513625.

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

It can be written as a sum of positive squares in 10 ways, for example, as 18256879659249 + 2115930981376 = 4272807^2 + 1454624^2 .

It is not a de Polignac number, because 20372810640625 - 2³⁵ = 20338450902257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 564185071 + ... + 564221179.

Almost surely, 2^{20372810640625} is an apocalyptic number.

20372810640625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20372810640625 is the 4513625-th square number.

20372810640625 is the 2256813-rd centered octagonal number.

It is an amenable number.

20372810640625 is a deficient number, since it is larger than the sum of its proper divisors (5093581959596).

20372810640625 is an frugal number, since it uses more digits than its factorization.

20372810640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72248 (or 36114 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20372810640625 in words is "twenty trillion, three hundred seventy-two billion, eight hundred ten million, six hundred forty thousand, six hundred twenty-five".