21873872922 has 64 divisors (see below), whose sum is σ = 48265352064. Its totient is φ = 6553763840.

The previous prime is 21873872903. The next prime is 21873872927. The reversal of 21873872922 is 22927837812.

It is not an unprimeable number, because it can be changed into a prime (21873872927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2319088 + ... + 2328500.

It is an arithmetic number, because the mean of its divisors is an integer number (754146126).

Almost surely, 2^21873872922 is an apocalyptic number.

21873872922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21873872922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24132676032).

21873872922 is an abundant number, since it is smaller than the sum of its proper divisors (26391479142).

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

21873872922 is a wasteful number, since it uses less digits than its factorization.

21873872922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9823.

The product of its digits is 1354752, while the sum is 51.

The spelling of 21873872922 in words is "twenty-one billion, eight hundred seventy-three million, eight hundred seventy-two thousand, nine hundred twenty-two".