18665349120 has 336 divisors, whose sum is σ = 70599982752. Its totient is φ = 4523950080.

The previous prime is 18665349107. The next prime is 18665349139. The reversal of 18665349120 is 2194356681.

18665349120 is a `hidden beast` number, since 1 + 8 + 6 + 6 + 534 + 91 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4052739 + ... + 4057341.

Almost surely, 2^18665349120 is an apocalyptic number.

18665349120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18665349120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35299991376).

18665349120 is an abundant number, since it is smaller than the sum of its proper divisors (51934633632).

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

18665349120 is a wasteful number, since it uses less digits than its factorization.

18665349120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651 (or 4624 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 18665349120 in words is "eighteen billion, six hundred sixty-five million, three hundred forty-nine thousand, one hundred twenty".