21714584 has 32 divisors (see below), whose sum is σ = 42033600. Its totient is φ = 10510080.

The previous prime is 21714571. The next prime is 21714607. The reversal of 21714584 is 48541712.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21714584.

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, 78254 + ... + 78530.

It is an arithmetic number, because the mean of its divisors is an integer number (1313550).

Almost surely, 2^21714584 is an apocalyptic number.

It is an amenable number.

21714584 is a deficient number, since it is larger than the sum of its proper divisors (20319016).

21714584 is a wasteful number, since it uses less digits than its factorization.

21714584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 559 counting only the distinct ones).

The product of its digits is 8960, while the sum is 32.

The square root of 21714584 is about 4659.8909858493. The cubic root of 21714584 is about 278.9869171634.

The spelling of 21714584 in words is "twenty-one million, seven hundred fourteen thousand, five hundred eighty-four".