21995026936800 has 144 divisors (see below), whose sum is σ = 71872389841392. Its totient is φ = 5842518016000.

The previous prime is 21995026936781. The next prime is 21995026936801. The reversal of 21995026936800 is 863962059912.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21995026936801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17213151 + ... + 18446750.

It is an arithmetic number, because the mean of its divisors is an integer number (499113818343).

Almost surely, 2^{21995026936800} is an apocalyptic number.

21995026936800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21995026936800 is an abundant number, since it is smaller than the sum of its proper divisors (49877362904592).

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

21995026936800 is a wasteful number, since it uses less digits than its factorization.

21995026936800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35660181 (or 35660168 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 21995026936800 in words is "twenty-one trillion, nine hundred ninety-five billion, twenty-six million, nine hundred thirty-six thousand, eight hundred".