21707413732 has 24 divisors (see below), whose sum is σ = 40039385400. Its totient is φ = 10281712896.

The previous prime is 21707413727. The next prime is 21707413733. The reversal of 21707413732 is 23731470712.

It can be written as a sum of positive squares in 4 ways, for example, as 8548111936 + 13159301796 = 92456^2 + 114714^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21707413691 and 21707413700.

It is not an unprimeable number, because it can be changed into a prime (21707413733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1759257 + ... + 1771552.

It is an arithmetic number, because the mean of its divisors is an integer number (1668307725).

Almost surely, 2^21707413732 is an apocalyptic number.

It is an amenable number.

21707413732 is a deficient number, since it is larger than the sum of its proper divisors (18331971668).

21707413732 is a wasteful number, since it uses less digits than its factorization.

21707413732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530895 (or 3530893 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The spelling of 21707413732 in words is "twenty-one billion, seven hundred seven million, four hundred thirteen thousand, seven hundred thirty-two".