22065870 has 16 divisors (see below), whose sum is σ = 52958160. Its totient is φ = 5884224.

The previous prime is 22065863. The next prime is 22065919. The reversal of 22065870 is 7856022.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 735529 = 22065870 / (2 + 2 + 0 + 6 + 5 + 8 + 7 + 0).

It is a Curzon number.

It is a congruent number.

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, 367735 + ... + 367794.

It is an arithmetic number, because the mean of its divisors is an integer number (3309885).

Almost surely, 2^22065870 is an apocalyptic number.

22065870 is an abundant number, since it is smaller than the sum of its proper divisors (30892290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22065870 is a wasteful number, since it uses less digits than its factorization.

22065870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735539.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 22065870 is about 4697.4322773192. The cubic root of 22065870 is about 280.4833064439.

The spelling of 22065870 in words is "twenty-two million, sixty-five thousand, eight hundred seventy".