21344342232 has 64 divisors (see below), whose sum is σ = 53630196480. Its totient is φ = 7078948992.

The previous prime is 21344342219. The next prime is 21344342251. The reversal of 21344342232 is 23224344312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21344342232.

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, 5411253 + ... + 5415195.

It is an arithmetic number, because the mean of its divisors is an integer number (837971820).

Almost surely, 2^21344342232 is an apocalyptic number.

It is an amenable number.

21344342232 is an abundant number, since it is smaller than the sum of its proper divisors (32285854248).

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

21344342232 is a wasteful number, since it uses less digits than its factorization.

21344342232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032 (or 5028 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

Adding to 21344342232 its reverse (23224344312), we get a palindrome (44568686544).

The spelling of 21344342232 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-two thousand, two hundred thirty-two".