18303731492 has 12 divisors (see below), whose sum is σ = 32556637596. Its totient is φ = 9001835040.

The previous prime is 18303731473. The next prime is 18303731521. The reversal of 18303731492 is 29413730381.

It can be written as a sum of positive squares in 2 ways, for example, as 757020196 + 17546711296 = 27514^2 + 132464^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37507403 + ... + 37507890.

It is an arithmetic number, because the mean of its divisors is an integer number (2713053133).

Almost surely, 2^18303731492 is an apocalyptic number.

It is an amenable number.

18303731492 is a deficient number, since it is larger than the sum of its proper divisors (14252906104).

18303731492 is a wasteful number, since it uses less digits than its factorization.

18303731492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75015358 (or 75015356 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 18303731492 in words is "eighteen billion, three hundred three million, seven hundred thirty-one thousand, four hundred ninety-two".