21403463232 has 56 divisors (see below), whose sum is σ = 57149593600. Its totient is φ = 7069026816.

The previous prime is 21403463219. The next prime is 21403463281. The reversal of 21403463232 is 23236430412.

It is a self number, because there is not a number n which added to its sum of digits gives 21403463232.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490432 + ... + 532287.

Almost surely, 2^21403463232 is an apocalyptic number.

It is an amenable number.

21403463232 is an abundant number, since it is smaller than the sum of its proper divisors (35746130368).

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

21403463232 is a wasteful number, since it uses less digits than its factorization.

21403463232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022843 (or 1022833 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21403463232 its reverse (23236430412), we get a palindrome (44639893644).

The spelling of 21403463232 in words is "twenty-one billion, four hundred three million, four hundred sixty-three thousand, two hundred thirty-two".