18236453572 has 12 divisors (see below), whose sum is σ = 32242802620. Its totient is φ = 9024224256.

The previous prime is 18236453563. The next prime is 18236453623. The reversal of 18236453572 is 27535463281.

It can be written as a sum of positive squares in 2 ways, for example, as 6700404736 + 11536048836 = 81856^2 + 107406^2 .

It is a hoax number, since the sum of its digits (46) 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, 23500197 + ... + 23500972.

Almost surely, 2^18236453572 is an apocalyptic number.

It is an amenable number.

18236453572 is a deficient number, since it is larger than the sum of its proper divisors (14006349048).

18236453572 is a wasteful number, since it uses less digits than its factorization.

18236453572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47001270 (or 47001268 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 18236453572 in words is "eighteen billion, two hundred thirty-six million, four hundred fifty-three thousand, five hundred seventy-two".