21920714445800 has 24 divisors (see below), whose sum is σ = 50965661086950. Its totient is φ = 8768285778240.

The previous prime is 21920714445787. The next prime is 21920714445881. The reversal of 21920714445800 is 854441702912.

It can be written as a sum of positive squares in 3 ways, for example, as 13181938921636 + 8738775524164 = 3630694^2 + 2956142^2 .

It is a super-2 number, since 2×21920714445800² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54801785915 + ... + 54801786314.

Almost surely, 2^{21920714445800} is an apocalyptic number.

21920714445800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21920714445800 is an abundant number, since it is smaller than the sum of its proper divisors (29044946641150).

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

21920714445800 is a wasteful number, since it uses less digits than its factorization.

21920714445800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109603572245 (or 109603572236 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 21920714445800 in words is "twenty-one trillion, nine hundred twenty billion, seven hundred fourteen million, four hundred forty-five thousand, eight hundred".