21413608 has 32 divisors (see below), whose sum is σ = 44755200. Its totient is φ = 9545472.

The previous prime is 21413599. The next prime is 21413611. The reversal of 21413608 is 80631412.

It is a congruent number.

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, 1560 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (1398600).

Almost surely, 2^21413608 is an apocalyptic number.

It is an amenable number.

21413608 is an abundant number, since it is smaller than the sum of its proper divisors (23341592).

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

21413608 is a wasteful number, since it uses less digits than its factorization.

21413608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8329 (or 8325 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21413608 is about 4627.4839816038. The cubic root of 21413608 is about 277.6919452259.

The spelling of 21413608 in words is "twenty-one million, four hundred thirteen thousand, six hundred eight".