21113813077407 has 32 divisors (see below), whose sum is σ = 31405051560960. Its totient is φ = 14019499375200.

The previous prime is 21113813077363. The next prime is 21113813077433. The reversal of 21113813077407 is 70477031831112.

21113813077407 is a `hidden beast` number, since 2 + 1 + 11 + 38 + 130 + 77 + 407 = 666.

It is not a de Polignac number, because 21113813077407 - 2²⁶ = 21113745968543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113813077447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34856773 + ... + 35457329.

It is an arithmetic number, because the mean of its divisors is an integer number (981407861280).

Almost surely, 2^{21113813077407} is an apocalyptic number.

21113813077407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21113813077407 is a deficient number, since it is larger than the sum of its proper divisors (10291238483553).

21113813077407 is a wasteful number, since it uses less digits than its factorization.

21113813077407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605780 (or 605774 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 21113813077407 in words is "twenty-one trillion, one hundred thirteen billion, eight hundred thirteen million, seventy-seven thousand, four hundred seven".