22182920 has 16 divisors (see below), whose sum is σ = 49911660. Its totient is φ = 8873152.

The previous prime is 22182907. The next prime is 22182929. The reversal of 22182920 is 2928122.

It can be written as a sum of positive squares in 2 ways, for example, as 21473956 + 708964 = 4634^2 + 842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22182920.

It is not an unprimeable number, because it can be changed into a prime (22182929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277247 + ... + 277326.

Almost surely, 2^22182920 is an apocalyptic number.

22182920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22182920 is an abundant number, since it is smaller than the sum of its proper divisors (27728740).

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

22182920 is a wasteful number, since it uses less digits than its factorization.

22182920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554584 (or 554580 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22182920 is about 4709.8747329414. The cubic root of 22182920 is about 280.9783800694.

The spelling of 22182920 in words is "twenty-two million, one hundred eighty-two thousand, nine hundred twenty".