21322502308 has 6 divisors (see below), whose sum is σ = 37314379046. Its totient is φ = 10661251152.

The previous prime is 21322502303. The next prime is 21322502309. The reversal of 21322502308 is 80320522312.

It can be written as a sum of positive squares in only one way, i.e., 16019458624 + 5303043684 = 126568^2 + 72822^2 .

It is not an unprimeable number, because it can be changed into a prime (21322502303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665312785 + ... + 2665312792.

Almost surely, 2^21322502308 is an apocalyptic number.

It is an amenable number.

21322502308 is a deficient number, since it is larger than the sum of its proper divisors (15991876738).

21322502308 is a wasteful number, since it uses less digits than its factorization.

21322502308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330625581 (or 5330625579 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21322502308 in words is "twenty-one billion, three hundred twenty-two million, five hundred two thousand, three hundred eight".