21431344210232 has 24 divisors (see below), whose sum is σ = 44168937708000. Its totient is φ = 9741520095120.

The previous prime is 21431344210229. The next prime is 21431344210259. The reversal of 21431344210232 is 23201244313412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11069908232 + ... + 11069910167.

It is an arithmetic number, because the mean of its divisors is an integer number (1840372404500).

Almost surely, 2^{21431344210232} is an apocalyptic number.

21431344210232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21431344210232 is an abundant number, since it is smaller than the sum of its proper divisors (22737593497768).

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

21431344210232 is a wasteful number, since it uses less digits than its factorization.

21431344210232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22139818427 (or 22139818412 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21431344210232 its reverse (23201244313412), we get a palindrome (44632588523644).

The spelling of 21431344210232 in words is "twenty-one trillion, four hundred thirty-one billion, three hundred forty-four million, two hundred ten thousand, two hundred thirty-two".