18001137459020 has 24 divisors (see below), whose sum is σ = 38606694807744. Its totient is φ = 7047253813376.

The previous prime is 18001137458987. The next prime is 18001137459037. The reversal of 18001137459020 is 2095473110081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575072177 + ... + 9575074056.

It is an arithmetic number, because the mean of its divisors is an integer number (1608612283656).

Almost surely, 2^{18001137459020} is an apocalyptic number.

18001137459020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18001137459020 is an abundant number, since it is smaller than the sum of its proper divisors (20605557348724).

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

18001137459020 is a wasteful number, since it uses less digits than its factorization.

18001137459020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19150146289 (or 19150146287 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 18001137459020 in words is "eighteen trillion, one billion, one hundred thirty-seven million, four hundred fifty-nine thousand, twenty".