18665033372 has 12 divisors (see below), whose sum is σ = 32693269560. Its totient is φ = 9324099216.

The previous prime is 18665033371. The next prime is 18665033407. The reversal of 18665033372 is 27333056681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18665033371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099378 + ... + 2108249.

It is an arithmetic number, because the mean of its divisors is an integer number (2724439130).

Almost surely, 2^18665033372 is an apocalyptic number.

It is an amenable number.

18665033372 is a deficient number, since it is larger than the sum of its proper divisors (14028236188).

18665033372 is a wasteful number, since it uses less digits than its factorization.

18665033372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208740 (or 4208738 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

It can be divided in two parts, 186650 and 33372, that added together give a palindrome (220022).

The spelling of 18665033372 in words is "eighteen billion, six hundred sixty-five million, thirty-three thousand, three hundred seventy-two".