21430113024 has 72 divisors (see below), whose sum is σ = 57067924032. Its totient is φ = 7139292160.

The previous prime is 21430113017. The next prime is 21430113041. The reversal of 21430113024 is 42031103412.

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, 1531339 + ... + 1545269.

It is an arithmetic number, because the mean of its divisors is an integer number (792610056).

Almost surely, 2^21430113024 is an apocalyptic number.

21430113024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21430113024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28533962016).

21430113024 is an abundant number, since it is smaller than the sum of its proper divisors (35637811008).

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

21430113024 is a wasteful number, since it uses less digits than its factorization.

21430113024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15953 (or 15939 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21430113024 its reverse (42031103412), we get a palindrome (63461216436).

The spelling of 21430113024 in words is "twenty-one billion, four hundred thirty million, one hundred thirteen thousand, twenty-four".