21713882 has 16 divisors (see below), whose sum is σ = 33554400. Its totient is φ = 10532592.

The previous prime is 21713873. The next prime is 21713893. The reversal of 21713882 is 28831712.

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, 13244 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (2097150).

Almost surely, 2^21713882 is an apocalyptic number.

21713882 is a deficient number, since it is larger than the sum of its proper divisors (11840518).

21713882 is a wasteful number, since it uses less digits than its factorization.

21713882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757.

The product of its digits is 5376, while the sum is 32.

The square root of 21713882 is about 4659.8156615901. The cubic root of 21713882 is about 278.9839107211.

The spelling of 21713882 in words is "twenty-one million, seven hundred thirteen thousand, eight hundred eighty-two".