21473972560000 has 80 divisors (see below), whose sum is σ = 53458112763990. Its totient is φ = 8589588992000.

The previous prime is 21473972559979. The next prime is 21473972560039. The reversal of 21473972560000 is 6527937412.

It can be written as a sum of positive squares in 5 ways, for example, as 140733020736 + 21333239539264 = 375144^2 + 4618792^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21473972560000² (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 9 ways as a sum of consecutive naturals, for example, 134132329 + ... + 134292328.

Almost surely, 2^{21473972560000} is an apocalyptic number.

21473972560000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21473972560000 is an abundant number, since it is smaller than the sum of its proper divisors (31984140203990).

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

21473972560000 is an frugal number, since it uses more digits than its factorization.

21473972560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268424691 (or 268424664 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 21473972560000 in words is "twenty-one trillion, four hundred seventy-three billion, nine hundred seventy-two million, five hundred sixty thousand".