20872385500 has 24 divisors (see below), whose sum is σ = 45585291024. Its totient is φ = 8348954000.

The previous prime is 20872385491. The next prime is 20872385503. The reversal of 20872385500 is 558327802.

It is a super-4 number, since 4×20872385500⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872385503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20871886 + ... + 20872885.

It is an arithmetic number, because the mean of its divisors is an integer number (1899387126).

Almost surely, 2^20872385500 is an apocalyptic number.

20872385500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20872385500 is an abundant number, since it is smaller than the sum of its proper divisors (24712905524).

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

20872385500 is a wasteful number, since it uses less digits than its factorization.

20872385500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41744790 (or 41744778 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 20872385500 in words is "twenty billion, eight hundred seventy-two million, three hundred eighty-five thousand, five hundred".