21076923813 has 12 divisors (see below), whose sum is σ = 30889596864. Its totient is φ = 12773893000.

The previous prime is 21076923739. The next prime is 21076923821. The reversal of 21076923813 is 31832967012.

It is not a de Polignac number, because 21076923813 - 2¹³ = 21076915621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076923853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29031213 + ... + 29031938.

It is an arithmetic number, because the mean of its divisors is an integer number (2574133072).

Almost surely, 2^21076923813 is an apocalyptic number.

It is an amenable number.

21076923813 is a deficient number, since it is larger than the sum of its proper divisors (9812673051).

21076923813 is a wasteful number, since it uses less digits than its factorization.

21076923813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58063176 (or 58063165 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 21076923813 in words is "twenty-one billion, seventy-six million, nine hundred twenty-three thousand, eight hundred thirteen".