21468504 has 16 divisors (see below), whose sum is σ = 53671320. Its totient is φ = 7156160.

The previous prime is 21468463. The next prime is 21468511. The reversal of 21468504 is 40586412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447237 + ... + 447284.

Almost surely, 2^21468504 is an apocalyptic number.

21468504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21468504 is an abundant number, since it is smaller than the sum of its proper divisors (32202816).

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

21468504 is a wasteful number, since it uses less digits than its factorization.

21468504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894530 (or 894526 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 21468504 is about 4633.4117019751. The cubic root of 21468504 is about 277.9290400812.

The spelling of 21468504 in words is "twenty-one million, four hundred sixty-eight thousand, five hundred four".