21176631013 has 24 divisors (see below), whose sum is σ = 22993937120. Its totient is φ = 19438392960.

The previous prime is 21176631011. The next prime is 21176631017. The reversal of 21176631013 is 31013667112.

It is not a de Polignac number, because 21176631013 - 2¹ = 21176631011 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 (21176631011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15333583 + ... + 15334963.

Almost surely, 2^21176631013 is an apocalyptic number.

It is an amenable number.

21176631013 is a deficient number, since it is larger than the sum of its proper divisors (1817306107).

21176631013 is a wasteful number, since it uses less digits than its factorization.

21176631013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 21176631013 in words is "twenty-one billion, one hundred seventy-six million, six hundred thirty-one thousand, thirteen".