21344131232 has 48 divisors (see below), whose sum is σ = 44670981600. Its totient is φ = 10010246400.

The previous prime is 21344131201. The next prime is 21344131273. The reversal of 21344131232 is 23213144312.

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, 112382 + ... + 235197.

It is an arithmetic number, because the mean of its divisors is an integer number (930645450).

Almost surely, 2^21344131232 is an apocalyptic number.

It is an amenable number.

21344131232 is an abundant number, since it is smaller than the sum of its proper divisors (23326850368).

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

21344131232 is a wasteful number, since it uses less digits than its factorization.

21344131232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347709 (or 347701 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 21344131232 its reverse (23213144312), we get a palindrome (44557275544).

The spelling of 21344131232 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred thirty-two".