21365562322 has 16 divisors (see below), whose sum is σ = 34901397720. Its totient is φ = 9750229632.

The previous prime is 21365562287. The next prime is 21365562331. The reversal of 21365562322 is 22326556312.

It can be written as a sum of positive squares in 4 ways, for example, as 4152384721 + 17213177601 = 64439^2 + 131199^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4614273 + ... + 4618900.

Almost surely, 2^21365562322 is an apocalyptic number.

21365562322 is a deficient number, since it is larger than the sum of its proper divisors (13535835398).

21365562322 is a wasteful number, since it uses less digits than its factorization.

21365562322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233277.

The product of its digits is 129600, while the sum is 37.

The spelling of 21365562322 in words is "twenty-one billion, three hundred sixty-five million, five hundred sixty-two thousand, three hundred twenty-two".