18748621475 has 12 divisors (see below), whose sum is σ = 23686939296. Its totient is φ = 14715898080.

The previous prime is 18748621459. The next prime is 18748621483. The reversal of 18748621475 is 57412684781.

It is not a de Polignac number, because 18748621475 - 2⁴ = 18748621459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7073627 + ... + 7076276.

It is an arithmetic number, because the mean of its divisors is an integer number (1973911608).

Almost surely, 2^18748621475 is an apocalyptic number.

18748621475 is a deficient number, since it is larger than the sum of its proper divisors (4938317821).

18748621475 is a wasteful number, since it uses less digits than its factorization.

18748621475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14149966 (or 14149961 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 53.

The spelling of 18748621475 in words is "eighteen billion, seven hundred forty-eight million, six hundred twenty-one thousand, four hundred seventy-five".