21474600800 has 72 divisors (see below), whose sum is σ = 53540385696. Its totient is φ = 8407063040.

The previous prime is 21474600773. The next prime is 21474600811. The reversal of 21474600800 is 800647412.

It is a super-2 number, since 2×21474600800² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247967 + ... + 323166.

It is an arithmetic number, because the mean of its divisors is an integer number (743616468).

Almost surely, 2^21474600800 is an apocalyptic number.

21474600800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21474600800 is an abundant number, since it is smaller than the sum of its proper divisors (32065784896).

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

21474600800 is a wasteful number, since it uses less digits than its factorization.

21474600800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571200 (or 571187 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 21474600800 in words is "twenty-one billion, four hundred seventy-four million, six hundred thousand, eight hundred".