21430234112 has 88 divisors (see below), whose sum is σ = 49025813760. Its totient is φ = 9171947520.

The previous prime is 21430234087. The next prime is 21430234157. The reversal of 21430234112 is 21143203412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6958589 + ... + 6961667.

It is an arithmetic number, because the mean of its divisors is an integer number (557111520).

Almost surely, 2^21430234112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21430234112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24512906880).

21430234112 is an abundant number, since it is smaller than the sum of its proper divisors (27595579648).

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

21430234112 is an equidigital number, since it uses as much as digits as its factorization.

21430234112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077 (or 4059 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21430234112 its reverse (21143203412), we get a palindrome (42573437524).

The spelling of 21430234112 in words is "twenty-one billion, four hundred thirty million, two hundred thirty-four thousand, one hundred twelve".