22023220 has 24 divisors (see below), whose sum is σ = 46809504. Its totient is φ = 8702496.

The previous prime is 22023217. The next prime is 22023227. The reversal of 22023220 is 2232022.

It is a self number, because there is not a number n which added to its sum of digits gives 22023220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22023227) 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, 4974 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (1950396).

Almost surely, 2^22023220 is an apocalyptic number.

22023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22023220 is an abundant number, since it is smaller than the sum of its proper divisors (24786284).

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

22023220 is a wasteful number, since it uses less digits than its factorization.

22023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13359 (or 13357 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 22023220 is about 4692.8903673536. The cubic root of 22023220 is about 280.3024792416.

Adding to 22023220 its reverse (2232022), we get a palindrome (24255242).

The spelling of 22023220 in words is "twenty-two million, twenty-three thousand, two hundred twenty".