21423022504 has 32 divisors (see below), whose sum is σ = 44313108840. Its totient is φ = 9646387200.

The previous prime is 21423022487. The next prime is 21423022529. The reversal of 21423022504 is 40522032412.

It can be written as a sum of positive squares in 4 ways, for example, as 16253700100 + 5169322404 = 127490^2 + 71898^2 .

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, 2507817 + ... + 2516344.

Almost surely, 2^21423022504 is an apocalyptic number.

It is an amenable number.

21423022504 is an abundant number, since it is smaller than the sum of its proper divisors (22890086336).

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

21423022504 is a wasteful number, since it uses less digits than its factorization.

21423022504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024221 (or 5024217 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 21423022504 its reverse (40522032412), we get a palindrome (61945054916).

The spelling of 21423022504 in words is "twenty-one billion, four hundred twenty-three million, twenty-two thousand, five hundred four".