21345430230 has 80 divisors (see below), whose sum is σ = 58616775360. Its totient is φ = 5570995968.

The previous prime is 21345430219. The next prime is 21345430283. The reversal of 21345430230 is 3203454312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21345430194 and 21345430203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 242275 + ... + 318414.

It is an arithmetic number, because the mean of its divisors is an integer number (732709692).

Almost surely, 2^21345430230 is an apocalyptic number.

21345430230 is an abundant number, since it is smaller than the sum of its proper divisors (37271345130).

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

21345430230 is a wasteful number, since it uses less digits than its factorization.

21345430230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560755 (or 560746 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21345430230 its reverse (3203454312), we get a palindrome (24548884542).

The spelling of 21345430230 in words is "twenty-one billion, three hundred forty-five million, four hundred thirty thousand, two hundred thirty".