21322331232 has 48 divisors (see below), whose sum is σ = 56150020080. Its totient is φ = 7084726272.

The previous prime is 21322331203. The next prime is 21322331273. The reversal of 21322331232 is 23213322312.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 324757 + ... + 384852.

It is an arithmetic number, because the mean of its divisors is an integer number (1169792085).

Almost surely, 2^21322331232 is an apocalyptic number.

It is an amenable number.

21322331232 is an abundant number, since it is smaller than the sum of its proper divisors (34827688848).

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

21322331232 is a wasteful number, since it uses less digits than its factorization.

21322331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709935 (or 709927 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 21322331232 its reverse (23213322312), we get a palindrome (44535653544).

The spelling of 21322331232 in words is "twenty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, two hundred thirty-two".