21893662 has 16 divisors (see below), whose sum is σ = 39507840. Its totient is φ = 8889048.

The previous prime is 21893659. The next prime is 21893687. The reversal of 21893662 is 26639812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40888 + ... + 41419.

It is an arithmetic number, because the mean of its divisors is an integer number (2469240).

Almost surely, 2^21893662 is an apocalyptic number.

21893662 is a deficient number, since it is larger than the sum of its proper divisors (17614178).

21893662 is a wasteful number, since it uses less digits than its factorization.

21893662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82335.

The product of its digits is 31104, while the sum is 37.

The square root of 21893662 is about 4679.0663598628. The cubic root of 21893662 is about 279.7517442403.

The spelling of 21893662 in words is "twenty-one million, eight hundred ninety-three thousand, six hundred sixty-two".