21322302232 has 64 divisors (see below), whose sum is σ = 51060119040. Its totient is φ = 8104761600.

The previous prime is 21322302223. The next prime is 21322302247. The reversal of 21322302232 is 23220322312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396868 + ... + 447379.

It is an arithmetic number, because the mean of its divisors is an integer number (797814360).

Almost surely, 2^21322302232 is an apocalyptic number.

21322302232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21322302232 is an abundant number, since it is smaller than the sum of its proper divisors (29737816808).

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

21322302232 is a wasteful number, since it uses less digits than its factorization.

21322302232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844312 (or 844308 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21322302232 its reverse (23220322312), we get a palindrome (44542624544).

The spelling of 21322302232 in words is "twenty-one billion, three hundred twenty-two million, three hundred two thousand, two hundred thirty-two".