21487962880800 has 216 divisors, whose sum is σ = 81600539395284. Its totient is φ = 5289344686080.

The previous prime is 21487962880793. The next prime is 21487962880817. The reversal of 21487962880800 is 808826978412.

It can be written as a sum of positive squares in 6 ways, for example, as 6247340283024 + 15240622597776 = 2499468^2 + 3903924^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 114692527 + ... + 114879726.

Almost surely, 2^{21487962880800} is an apocalyptic number.

21487962880800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21487962880800 is an abundant number, since it is smaller than the sum of its proper divisors (60112576514484).

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

21487962880800 is a wasteful number, since it uses less digits than its factorization.

21487962880800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229572292 (or 229572276 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 63.

The spelling of 21487962880800 in words is "twenty-one trillion, four hundred eighty-seven billion, nine hundred sixty-two million, eight hundred eighty thousand, eight hundred".