21403320232 has 64 divisors (see below), whose sum is σ = 46090437120. Its totient is φ = 9127738368.

The previous prime is 21403320223. The next prime is 21403320233. The reversal of 21403320232 is 23202330412.

It is not an unprimeable number, because it can be changed into a prime (21403320233) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15040273 + ... + 15041695.

It is an arithmetic number, because the mean of its divisors is an integer number (720163080).

Almost surely, 2^21403320232 is an apocalyptic number.

It is an amenable number.

21403320232 is an abundant number, since it is smaller than the sum of its proper divisors (24687116888).

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

21403320232 is a wasteful number, since it uses less digits than its factorization.

21403320232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2566 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21403320232 its reverse (23202330412), we get a palindrome (44605650644).

The spelling of 21403320232 in words is "twenty-one billion, four hundred three million, three hundred twenty thousand, two hundred thirty-two".