22164020 has 12 divisors (see below), whose sum is σ = 46544484. Its totient is φ = 8865600.

The previous prime is 22164011. The next prime is 22164029. The reversal of 22164020 is 2046122.

It is an interprime number because it is at equal distance from previous prime (22164011) and next prime (22164029).

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 5484964 = 4084^2 + 2342^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22164020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22164029) 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, 554081 + ... + 554120.

It is an arithmetic number, because the mean of its divisors is an integer number (3878707).

Almost surely, 2^22164020 is an apocalyptic number.

22164020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22164020 is an abundant number, since it is smaller than the sum of its proper divisors (24380464).

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

22164020 is a wasteful number, since it uses less digits than its factorization.

22164020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108210 (or 1108208 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22164020 is about 4707.8678825982. The cubic root of 22164020 is about 280.8985588933.

The spelling of 22164020 in words is "twenty-two million, one hundred sixty-four thousand, twenty".