21552919322 has 16 divisors (see below), whose sum is σ = 36406105344. Its totient is φ = 9480756000.

The previous prime is 21552919279. The next prime is 21552919331. The reversal of 21552919322 is 22391925512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21552919322.

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, 15800579 + ... + 15801942.

It is an arithmetic number, because the mean of its divisors is an integer number (2275381584).

Almost surely, 2^21552919322 is an apocalyptic number.

21552919322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21552919322 is a deficient number, since it is larger than the sum of its proper divisors (14853186022).

21552919322 is a wasteful number, since it uses less digits than its factorization.

21552919322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31602565.

The product of its digits is 97200, while the sum is 41.

The spelling of 21552919322 in words is "twenty-one billion, five hundred fifty-two million, nine hundred nineteen thousand, three hundred twenty-two".