21447174260000 has 120 divisors (see below), whose sum is σ = 53285679346284. Its totient is φ = 8493929600000.

The previous prime is 21447174259877. The next prime is 21447174260033. The reversal of 21447174260000 is 6247174412.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1234560987664 + 20212613272336 = 1111108^2 + 4495844^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3288707 + ... + 7328706.

Almost surely, 2^{21447174260000} is an apocalyptic number.

21447174260000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21447174260000 is an abundant number, since it is smaller than the sum of its proper divisors (31838505086284).

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

21447174260000 is a wasteful number, since it uses less digits than its factorization.

21447174260000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10617544 (or 10617521 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 21447174260000 in words is "twenty-one trillion, four hundred forty-seven billion, one hundred seventy-four million, two hundred sixty thousand".