21137376323163 has 16 divisors (see below), whose sum is σ = 28327819377440. Its totient is φ = 14019443483904.

The previous prime is 21137376323159. The next prime is 21137376323237. The reversal of 21137376323163 is 36132367373112.

It is a happy number.

It is not a de Polignac number, because 21137376323163 - 2² = 21137376323159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21137376323563) 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, 22634656 + ... + 23549997.

It is an arithmetic number, because the mean of its divisors is an integer number (1770488711090).

Almost surely, 2^{21137376323163} is an apocalyptic number.

21137376323163 is a deficient number, since it is larger than the sum of its proper divisors (7190443054277).

21137376323163 is a wasteful number, since it uses less digits than its factorization.

21137376323163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46185438.

The product of its digits is 1714608, while the sum is 48.

The spelling of 21137376323163 in words is "twenty-one trillion, one hundred thirty-seven billion, three hundred seventy-six million, three hundred twenty-three thousand, one hundred sixty-three".