18377665938724 has 9 divisors (see below), whose sum is σ = 32160930396987. Its totient is φ = 9188828682444.

The previous prime is 18377665938707. The next prime is 18377665938727. The reversal of 18377665938724 is 42783956677381.

The square root of 18377665938724 is 4286918.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18377665938727) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7502107 + ... + 9645565.

Almost surely, 2^{18377665938724} is an apocalyptic number.

18377665938724 is the 4286918-th square number.

It is an amenable number.

18377665938724 is a deficient number, since it is larger than the sum of its proper divisors (13783264458263).

18377665938724 is an frugal number, since it uses more digits than its factorization.

18377665938724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286922 (or 2143461 counting only the distinct ones).

The product of its digits is 2560481280, while the sum is 76.

The spelling of 18377665938724 in words is "eighteen trillion, three hundred seventy-seven billion, six hundred sixty-five million, nine hundred thirty-eight thousand, seven hundred twenty-four".