21937883 has 8 divisors (see below), whose sum is σ = 24973056. Its totient is φ = 19076200.

The previous prime is 21937879. The next prime is 21937897. The reversal of 21937883 is 38873912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21937883 - 2² = 21937879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21937883.

It is not an unprimeable number, because it can be changed into a prime (21937843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43103 + ... + 43608.

It is an arithmetic number, because the mean of its divisors is an integer number (3121632).

Almost surely, 2^21937883 is an apocalyptic number.

21937883 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21937883 is a deficient number, since it is larger than the sum of its proper divisors (3035173).

21937883 is a wasteful number, since it uses less digits than its factorization.

21937883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86745.

The product of its digits is 72576, while the sum is 41.

The square root of 21937883 is about 4683.7893846756. The cubic root of 21937883 is about 279.9399658706.

The spelling of 21937883 in words is "twenty-one million, nine hundred thirty-seven thousand, eight hundred eighty-three".