21136618713 has 16 divisors (see below), whose sum is σ = 32327038976. Its totient is φ = 12033496080.

The previous prime is 21136618681. The next prime is 21136618733. The reversal of 21136618713 is 31781663112.

It is not a de Polignac number, because 21136618713 - 2⁵ = 21136618681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21136618733) 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, 1851331 + ... + 1862712.

It is an arithmetic number, because the mean of its divisors is an integer number (2020439936).

Almost surely, 2^21136618713 is an apocalyptic number.

It is an amenable number.

21136618713 is a deficient number, since it is larger than the sum of its proper divisors (11190420263).

21136618713 is a wasteful number, since it uses less digits than its factorization.

21136618713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714324.

The product of its digits is 36288, while the sum is 39.

The spelling of 21136618713 in words is "twenty-one billion, one hundred thirty-six million, six hundred eighteen thousand, seven hundred thirteen".