21312303032 has 32 divisors (see below), whose sum is σ = 40843526400. Its totient is φ = 10421060064.

The previous prime is 21312303013. The next prime is 21312303043. The reversal of 21312303032 is 23030321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312302995 and 21312303013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460319 + ... + 504497.

It is an arithmetic number, because the mean of its divisors is an integer number (1276360200).

Almost surely, 2^21312303032 is an apocalyptic number.

It is an amenable number.

21312303032 is a deficient number, since it is larger than the sum of its proper divisors (19531223368).

21312303032 is a wasteful number, since it uses less digits than its factorization.

21312303032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45515 (or 45511 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21312303032 its reverse (23030321312), we get a palindrome (44342624344).

The spelling of 21312303032 in words is "twenty-one billion, three hundred twelve million, three hundred three thousand, thirty-two".