18016732724 has 12 divisors (see below), whose sum is σ = 31619626500. Its totient is φ = 8982553728.

The previous prime is 18016732717. The next prime is 18016732777. The reversal of 18016732724 is 42723761081.

It can be written as a sum of positive squares in 2 ways, for example, as 13994890000 + 4021842724 = 118300^2 + 63418^2 .

It is a congruent number.

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, 6451589 + ... + 6454380.

It is an arithmetic number, because the mean of its divisors is an integer number (2634968875).

Almost surely, 2^18016732724 is an apocalyptic number.

It is an amenable number.

18016732724 is a deficient number, since it is larger than the sum of its proper divisors (13602893776).

18016732724 is a wasteful number, since it uses less digits than its factorization.

18016732724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906322 (or 12906320 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 18016732724 in words is "eighteen billion, sixteen million, seven hundred thirty-two thousand, seven hundred twenty-four".