18562972516 has 45 divisors (see below), whose sum is σ = 35797082755. Its totient is φ = 8422727720.

The previous prime is 18562972511. The next prime is 18562972523. The reversal of 18562972516 is 61527926581.

It is a happy number.

The square root of 18562972516 is 136246.

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

It is a Duffinian number.

Its product of digits (1814400) is a multiple of the sum of its prime divisors (576).

It is not an unprimeable number, because it can be changed into a prime (18562972511) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 32971251 + ... + 32971813.

Almost surely, 2^18562972516 is an apocalyptic number.

18562972516 is the 136246-th square number.

It is an amenable number.

18562972516 is a deficient number, since it is larger than the sum of its proper divisors (17234110239).

18562972516 is an frugal number, since it uses more digits than its factorization.

18562972516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 576 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 18562972516 in words is "eighteen billion, five hundred sixty-two million, nine hundred seventy-two thousand, five hundred sixteen".