20312631652165 has 16 divisors (see below), whose sum is σ = 24395977951488. Its totient is φ = 16236228266496.

The previous prime is 20312631652153. The next prime is 20312631652169. The reversal of 20312631652165 is 56125613621302.

It is a cyclic number.

It is not a de Polignac number, because 20312631652165 - 2¹³ = 20312631643973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312631652169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56914864 + ... + 57270646.

It is an arithmetic number, because the mean of its divisors is an integer number (1524748621968).

Almost surely, 2^{20312631652165} is an apocalyptic number.

It is an amenable number.

20312631652165 is a deficient number, since it is larger than the sum of its proper divisors (4083346299323).

20312631652165 is a wasteful number, since it uses less digits than its factorization.

20312631652165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365508.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 20312631652165 in words is "twenty trillion, three hundred twelve billion, six hundred thirty-one million, six hundred fifty-two thousand, one hundred sixty-five".