21444022230 has 32 divisors (see below), whose sum is σ = 52043925600. Its totient is φ = 5654153472.

The previous prime is 21444022183. The next prime is 21444022267. The reversal of 21444022230 is 3222044412.

It is a self number, because there is not a number n which added to its sum of digits gives 21444022230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4013065 + ... + 4018404.

It is an arithmetic number, because the mean of its divisors is an integer number (1626372675).

Almost surely, 2^21444022230 is an apocalyptic number.

21444022230 is an abundant number, since it is smaller than the sum of its proper divisors (30599903370).

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

21444022230 is a wasteful number, since it uses less digits than its factorization.

21444022230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031568.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21444022230 its reverse (3222044412), we get a palindrome (24666066642).

The spelling of 21444022230 in words is "twenty-one billion, four hundred forty-four million, twenty-two thousand, two hundred thirty".