21124313432 has 8 divisors (see below), whose sum is σ = 39608087700. Its totient is φ = 10562156712.

The previous prime is 21124313401. The next prime is 21124313459. The reversal of 21124313432 is 23431342112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320269582 + ... + 1320269597.

Almost surely, 2^21124313432 is an apocalyptic number.

It is an amenable number.

21124313432 is a deficient number, since it is larger than the sum of its proper divisors (18483774268).

21124313432 is a wasteful number, since it uses less digits than its factorization.

21124313432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640539185 (or 2640539181 counting only the distinct ones).

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

Adding to 21124313432 its reverse (23431342112), we get a palindrome (44555655544).

The spelling of 21124313432 in words is "twenty-one billion, one hundred twenty-four million, three hundred thirteen thousand, four hundred thirty-two".