21937059 has 6 divisors (see below), whose sum is σ = 31686876. Its totient is φ = 14624700.

The previous prime is 21937049. The next prime is 21937061. The reversal of 21937059 is 95073912.

It is not a de Polignac number, because 21937059 - 2⁷ = 21936931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21937049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1218717 + ... + 1218734.

It is an arithmetic number, because the mean of its divisors is an integer number (5281146).

Almost surely, 2^21937059 is an apocalyptic number.

21937059 is a deficient number, since it is larger than the sum of its proper divisors (9749817).

21937059 is a wasteful number, since it uses less digits than its factorization.

21937059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437457 (or 2437454 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 21937059 is about 4683.7014208850. The cubic root of 21937059 is about 279.9364609226.

The spelling of 21937059 in words is "twenty-one million, nine hundred thirty-seven thousand, fifty-nine".