21031402232 has 32 divisors (see below), whose sum is σ = 39712857600. Its totient is φ = 10441401984.

The previous prime is 21031402229. The next prime is 21031402237. The reversal of 21031402232 is 23220413012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031402237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2083694 + ... + 2093762.

It is an arithmetic number, because the mean of its divisors is an integer number (1241026800).

Almost surely, 2^21031402232 is an apocalyptic number.

It is an amenable number.

21031402232 is a deficient number, since it is larger than the sum of its proper divisors (18681455368).

21031402232 is a wasteful number, since it uses less digits than its factorization.

21031402232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11895 (or 11891 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21031402232 its reverse (23220413012), we get a palindrome (44251815244).

The spelling of 21031402232 in words is "twenty-one billion, thirty-one million, four hundred two thousand, two hundred thirty-two".