21302408800 has 72 divisors (see below), whose sum is σ = 52780824936. Its totient is φ = 8393763840.

The previous prime is 21302408797. The next prime is 21302408899. The reversal of 21302408800 is 880420312.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 145117 + ... + 252316.

It is an arithmetic number, because the mean of its divisors is an integer number (733067013).

Almost surely, 2^21302408800 is an apocalyptic number.

21302408800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302408800 is an abundant number, since it is smaller than the sum of its proper divisors (31478416136).

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

21302408800 is a wasteful number, since it uses less digits than its factorization.

21302408800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397520 (or 397507 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 21302408800 in words is "twenty-one billion, three hundred two million, four hundred eight thousand, eight hundred".