21939622852620 has 48 divisors (see below), whose sum is σ = 67015575260928. Its totient is φ = 5318696448960.

The previous prime is 21939622852613. The next prime is 21939622852627. The reversal of 21939622852620 is 2625822693912.

It is an interprime number because it is at equal distance from previous prime (21939622852613) and next prime (21939622852627).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21939622852627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16620925744 + ... + 16620927063.

It is an arithmetic number, because the mean of its divisors is an integer number (1396157817936).

Almost surely, 2^{21939622852620} is an apocalyptic number.

21939622852620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21939622852620 is an abundant number, since it is smaller than the sum of its proper divisors (45075952408308).

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

21939622852620 is a wasteful number, since it uses less digits than its factorization.

21939622852620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33241852830 (or 33241852828 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 21939622852620 in words is "twenty-one trillion, nine hundred thirty-nine billion, six hundred twenty-two million, eight hundred fifty-two thousand, six hundred twenty".