20013657313225 has 12 divisors (see below), whose sum is σ = 24816991375900. Its totient is φ = 16010889523200.

The previous prime is 20013657313219. The next prime is 20013657313267. The reversal of 20013657313225 is 52231375631002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1651952390089 + 18361704923136 = 1285283^2 + 4285056^2 .

It is not a de Polignac number, because 20013657313225 - 2²³ = 20013648924617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18279265 + ... + 19343185.

Almost surely, 2^{20013657313225} is an apocalyptic number.

20013657313225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20013657313225 is a deficient number, since it is larger than the sum of its proper divisors (4803334062675).

20013657313225 is a wasteful number, since it uses less digits than its factorization.

20013657313225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816380 (or 1816375 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 20013657313225 in words is "twenty trillion, thirteen billion, six hundred fifty-seven million, three hundred thirteen thousand, two hundred twenty-five".