18391936483 has 16 divisors (see below), whose sum is σ = 19710864000. Its totient is φ = 17108788032.

The previous prime is 18391936441. The next prime is 18391936487. The reversal of 18391936483 is 38463919381.

It is not a de Polignac number, because 18391936483 - 2⁹ = 18391935971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18391936487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1007703 + ... + 1025791.

It is an arithmetic number, because the mean of its divisors is an integer number (1231929000).

Almost surely, 2^18391936483 is an apocalyptic number.

18391936483 is a deficient number, since it is larger than the sum of its proper divisors (1318927517).

18391936483 is a wasteful number, since it uses less digits than its factorization.

18391936483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19074.

The product of its digits is 3359232, while the sum is 55.

The spelling of 18391936483 in words is "eighteen billion, three hundred ninety-one million, nine hundred thirty-six thousand, four hundred eighty-three".