18479157631 has 6 divisors (see below), whose sum is σ = 20311801496. Its totient is φ = 16799234100.

The previous prime is 18479157611. The next prime is 18479157643. The reversal of 18479157631 is 13675197481.

It is not a de Polignac number, because 18479157631 - 2²⁷ = 18344939903 is a prime.

It is a super-2 number, since 2×18479157631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18479157611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76360035 + ... + 76360276.

Almost surely, 2^18479157631 is an apocalyptic number.

18479157631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18479157631 is a deficient number, since it is larger than the sum of its proper divisors (1832643865).

18479157631 is a wasteful number, since it uses less digits than its factorization.

18479157631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152720333 (or 152720322 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 52.

The spelling of 18479157631 in words is "eighteen billion, four hundred seventy-nine million, one hundred fifty-seven thousand, six hundred thirty-one".