18609903721152 has 140 divisors (see below), whose sum is σ = 55380240628680. Its totient is φ = 6179163439104.

The previous prime is 18609903721021. The next prime is 18609903721163. The reversal of 18609903721152 is 25112730990681.

It is a happy number.

18609903721152 is a `hidden beast` number, since 1 + 8 + 609 + 9 + 0 + 3 + 7 + 21 + 1 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5651902 + ... + 8316477.

Almost surely, 2^{18609903721152} is an apocalyptic number.

18609903721152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18609903721152 is an abundant number, since it is smaller than the sum of its proper divisors (36770336907528).

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

18609903721152 is a wasteful number, since it uses less digits than its factorization.

18609903721152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13968660 (or 13968641 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 18609903721152 in words is "eighteen trillion, six hundred nine billion, nine hundred three million, seven hundred twenty-one thousand, one hundred fifty-two".