21714566 has 16 divisors (see below), whose sum is σ = 33224256. Its totient is φ = 10641576.

The previous prime is 21714547. The next prime is 21714571. The reversal of 21714566 is 66541712.

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, 46265 + ... + 46731.

It is an arithmetic number, because the mean of its divisors is an integer number (2076516).

Almost surely, 2^21714566 is an apocalyptic number.

21714566 is a deficient number, since it is larger than the sum of its proper divisors (11509690).

21714566 is a wasteful number, since it uses less digits than its factorization.

21714566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its digits is 10080, while the sum is 32.

The square root of 21714566 is about 4659.8890544733. The cubic root of 21714566 is about 278.9868400759.

The spelling of 21714566 in words is "twenty-one million, seven hundred fourteen thousand, five hundred sixty-six".