23137644347 has 4 divisors (see below), whose sum is σ = 23304102360. Its totient is φ = 22971186336.

The previous prime is 23137644323. The next prime is 23137644389. The reversal of 23137644347 is 74344673132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23137644347 - 2²⁰ = 23136595771 is a prime.

It is a super-2 number, since 2×23137644347² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23137644298 and 23137644307.

It is not an unprimeable number, because it can be changed into a prime (23137644547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83228798 + ... + 83229075.

It is an arithmetic number, because the mean of its divisors is an integer number (5826025590).

Almost surely, 2^23137644347 is an apocalyptic number.

23137644347 is a deficient number, since it is larger than the sum of its proper divisors (166458013).

23137644347 is a wasteful number, since it uses less digits than its factorization.

23137644347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166458012.

The product of its digits is 1016064, while the sum is 44.

The spelling of 23137644347 in words is "twenty-three billion, one hundred thirty-seven million, six hundred forty-four thousand, three hundred forty-seven".