21453360504 has 64 divisors (see below), whose sum is σ = 54044496000. Its totient is φ = 7096475520.

The previous prime is 21453360499. The next prime is 21453360517. The reversal of 21453360504 is 40506335412.

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, 2181759 + ... + 2191569.

It is an arithmetic number, because the mean of its divisors is an integer number (844445250).

Almost surely, 2^21453360504 is an apocalyptic number.

21453360504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21453360504 is an abundant number, since it is smaller than the sum of its proper divisors (32591135496).

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

21453360504 is a wasteful number, since it uses less digits than its factorization.

21453360504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508 (or 10504 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 21453360504 its reverse (40506335412), we get a palindrome (61959695916).

The spelling of 21453360504 in words is "twenty-one billion, four hundred fifty-three million, three hundred sixty thousand, five hundred four".