18150961920 has 576 divisors, whose sum is σ = 72084848640. Its totient is φ = 3790209024.

The previous prime is 18150961919. The next prime is 18150961951. The reversal of 18150961920 is 2916905181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44378676 + ... + 44379084.

Almost surely, 2^18150961920 is an apocalyptic number.

18150961920 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 18150961920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36042424320).

18150961920 is an abundant number, since it is smaller than the sum of its proper divisors (53933886720).

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

18150961920 is a wasteful number, since it uses less digits than its factorization.

18150961920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 18150961920 in words is "eighteen billion, one hundred fifty million, nine hundred sixty-one thousand, nine hundred twenty".