21112514430 has 128 divisors (see below), whose sum is σ = 63606988800. Its totient is φ = 4372942464.

The previous prime is 21112514429. The next prime is 21112514441. The reversal of 21112514430 is 3441521112.

It is a self number, because there is not a number n which added to its sum of digits gives 21112514430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23260 + ... + 206799.

It is an arithmetic number, because the mean of its divisors is an integer number (496929600).

Almost surely, 2^21112514430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112514430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31803494400).

21112514430 is an abundant number, since it is smaller than the sum of its proper divisors (42494474370).

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

21112514430 is a wasteful number, since it uses less digits than its factorization.

21112514430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230118.

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 21112514430 in words is "twenty-one billion, one hundred twelve million, five hundred fourteen thousand, four hundred thirty".