21430409232 has 40 divisors (see below), whose sum is σ = 56406461184. Its totient is φ = 7008686464.

The previous prime is 21430409227. The next prime is 21430409233. The reversal of 21430409232 is 23290403412.

It is a self number, because there is not a number n which added to its sum of digits gives 21430409232.

It is not an unprimeable number, because it can be changed into a prime (21430409233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4209408 + ... + 4214495.

Almost surely, 2^21430409232 is an apocalyptic number.

It is an amenable number.

21430409232 is an abundant number, since it is smaller than the sum of its proper divisors (34976051952).

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

21430409232 is a wasteful number, since it uses less digits than its factorization.

21430409232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8423967 (or 8423961 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 21430409232 in words is "twenty-one billion, four hundred thirty million, four hundred nine thousand, two hundred thirty-two".