21975058 has 16 divisors (see below), whose sum is σ = 39654720. Its totient is φ = 8922096.

The previous prime is 21975053. The next prime is 21975061. The reversal of 21975058 is 85057912.

It is not an unprimeable number, because it can be changed into a prime (21975053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41041 + ... + 41572.

It is an arithmetic number, because the mean of its divisors is an integer number (2478420).

Almost surely, 2^21975058 is an apocalyptic number.

21975058 is a deficient number, since it is larger than the sum of its proper divisors (17679662).

21975058 is a wasteful number, since it uses less digits than its factorization.

21975058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82641.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 21975058 is about 4687.7561796663. The cubic root of 21975058 is about 280.0980014093.

The spelling of 21975058 in words is "twenty-one million, nine hundred seventy-five thousand, fifty-eight".