21431566314 has 36 divisors (see below), whose sum is σ = 47724035814. Its totient is φ = 6950770272.

The previous prime is 21431566259. The next prime is 21431566339. The reversal of 21431566314 is 41366513412.

21431566314 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 15 + 6 + 631 + 4 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 21204310689 + 227255625 = 145617^2 + 15075^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 410217 + ... + 459500.

Almost surely, 2^21431566314 is an apocalyptic number.

21431566314 is an abundant number, since it is smaller than the sum of its proper divisors (26292469500).

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

21431566314 is a wasteful number, since it uses less digits than its factorization.

21431566314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869799 (or 869759 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 21431566314 in words is "twenty-one billion, four hundred thirty-one million, five hundred sixty-six thousand, three hundred fourteen".