20117620371500 has 96 divisors (see below), whose sum is σ = 45131182387200. Its totient is φ = 7828377696000.

The previous prime is 20117620371493. The next prime is 20117620371623. The reversal of 20117620371500 is 517302671102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127774826 + ... + 127932174.

It is an arithmetic number, because the mean of its divisors is an integer number (470116483200).

Almost surely, 2^{20117620371500} is an apocalyptic number.

20117620371500 is a gapful number since it is divisible by the number (20) 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 20117620371500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22565591193600).

20117620371500 is an abundant number, since it is smaller than the sum of its proper divisors (25013562015700).

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

20117620371500 is a wasteful number, since it uses less digits than its factorization.

20117620371500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164316 (or 164304 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 20117620371500 in words is "twenty trillion, one hundred seventeen billion, six hundred twenty million, three hundred seventy-one thousand, five hundred".