18170113920 has 512 divisors, whose sum is σ = 69209856000. Its totient is φ = 3968040960.

The previous prime is 18170113903. The next prime is 18170113933. The reversal of 18170113920 is 2931107181.

It is a congruent number.

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, 30333781 + ... + 30334379.

It is an arithmetic number, because the mean of its divisors is an integer number (135175500).

Almost surely, 2^18170113920 is an apocalyptic number.

18170113920 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 18170113920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34604928000).

18170113920 is an abundant number, since it is smaller than the sum of its proper divisors (51039742080).

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

18170113920 is a wasteful number, since it uses less digits than its factorization.

18170113920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 33.

The spelling of 18170113920 in words is "eighteen billion, one hundred seventy million, one hundred thirteen thousand, nine hundred twenty".