18729017316 has 45 divisors (see below), whose sum is σ = 48967791411. Its totient is φ = 6242184648.

The previous prime is 18729017299. The next prime is 18729017387. The reversal of 18729017316 is 61371092781.

The square root of 18729017316 is 136854.

It is a perfect power (a square), and thus also a powerful number.

18729017316 is a `hidden beast` number, since 187 + 290 + 173 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2459571 + ... + 2467173.

Almost surely, 2^18729017316 is an apocalyptic number.

18729017316 is the 136854-th square number.

It is an amenable number.

18729017316 is an abundant number, since it is smaller than the sum of its proper divisors (30238774095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18729017316 is an frugal number, since it uses more digits than its factorization.

18729017316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222 (or 7608 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 18729017316 in words is "eighteen billion, seven hundred twenty-nine million, seventeen thousand, three hundred sixteen".