21430013120 has 28 divisors (see below), whose sum is σ = 51030219504. Its totient is φ = 8572005120.

The previous prime is 21430013063. The next prime is 21430013149. The reversal of 21430013120 is 2131003412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33484076 + ... + 33484715.

Almost surely, 2^21430013120 is an apocalyptic number.

21430013120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21430013120 is an abundant number, since it is smaller than the sum of its proper divisors (29600206384).

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

21430013120 is an equidigital number, since it uses as much as digits as its factorization.

21430013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66968808 (or 66968798 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21430013120 its reverse (2131003412), we get a palindrome (23561016532).

The spelling of 21430013120 in words is "twenty-one billion, four hundred thirty million, thirteen thousand, one hundred twenty".