18287474331 has 128 divisors (see below), whose sum is σ = 31098470400. Its totient is φ = 9327467520.

The previous prime is 18287474291. The next prime is 18287474339. The reversal of 18287474331 is 13347478281.

It is not a de Polignac number, because 18287474331 - 2⁷ = 18287474203 is a prime.

It is a super-2 number, since 2×18287474331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18287474339) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 76516510 + ... + 76516748.

It is an arithmetic number, because the mean of its divisors is an integer number (242956800).

Almost surely, 2^18287474331 is an apocalyptic number.

18287474331 is a deficient number, since it is larger than the sum of its proper divisors (12810996069).

18287474331 is a wasteful number, since it uses less digits than its factorization.

18287474331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 903168, while the sum is 48.

The spelling of 18287474331 in words is "eighteen billion, two hundred eighty-seven million, four hundred seventy-four thousand, three hundred thirty-one".