18059209920 has 336 divisors, whose sum is σ = 65089552320. Its totient is φ = 4587061248.

The previous prime is 18059209891. The next prime is 18059209951. The reversal of 18059209920 is 2990295081.

It is a super-2 number, since 2×18059209920² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 47 ways as a sum of consecutive naturals, for example, 22322476 + ... + 22323284.

Almost surely, 2^18059209920 is an apocalyptic number.

18059209920 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 18059209920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32544776160).

18059209920 is an abundant number, since it is smaller than the sum of its proper divisors (47030342400).

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

18059209920 is a wasteful number, since it uses less digits than its factorization.

18059209920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 18059209920 in words is "eighteen billion, fifty-nine million, two hundred nine thousand, nine hundred twenty".