18627909923 has 12 divisors (see below), whose sum is σ = 22130250912. Its totient is φ = 15627059280.

The previous prime is 18627909877. The next prime is 18627909929. The reversal of 18627909923 is 32990972681.

It is not a de Polignac number, because 18627909923 - 2²⁰ = 18626861347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18627909929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4041968 + ... + 4046573.

It is an arithmetic number, because the mean of its divisors is an integer number (1844187576).

Almost surely, 2^18627909923 is an apocalyptic number.

18627909923 is a deficient number, since it is larger than the sum of its proper divisors (3502340989).

18627909923 is an equidigital number, since it uses as much as digits as its factorization.

18627909923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088602 (or 8088595 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 18627909923 in words is "eighteen billion, six hundred twenty-seven million, nine hundred nine thousand, nine hundred twenty-three".