21232410432 has 28 divisors (see below), whose sum is σ = 56177419776. Its totient is φ = 7077470080.

The previous prime is 21232410391. The next prime is 21232410443. The reversal of 21232410432 is 23401423212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55292544 + ... + 55292927.

Almost surely, 2^21232410432 is an apocalyptic number.

It is an amenable number.

21232410432 is an abundant number, since it is smaller than the sum of its proper divisors (34945009344).

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

21232410432 is a wasteful number, since it uses less digits than its factorization.

21232410432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110585486 (or 110585476 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21232410432 its reverse (23401423212), we get a palindrome (44633833644).

The spelling of 21232410432 in words is "twenty-one billion, two hundred thirty-two million, four hundred ten thousand, four hundred thirty-two".