22223620 has 12 divisors (see below), whose sum is σ = 46669644. Its totient is φ = 8889440.

The previous prime is 22223611. The next prime is 22223623. The reversal of 22223620 is 2632222.

It can be written as a sum of positive squares in 2 ways, for example, as 13883076 + 8340544 = 3726^2 + 2888^2 .

It is not an unprimeable number, because it can be changed into a prime (22223623) 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, 555571 + ... + 555610.

It is an arithmetic number, because the mean of its divisors is an integer number (3889137).

Almost surely, 2^22223620 is an apocalyptic number.

22223620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22223620 is an abundant number, since it is smaller than the sum of its proper divisors (24446024).

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

22223620 is a wasteful number, since it uses less digits than its factorization.

22223620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111190 (or 1111188 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22223620 is about 4714.1934623008. The cubic root of 22223620 is about 281.1501163008.

Adding to 22223620 its reverse (2632222), we get a palindrome (24855842).

The spelling of 22223620 in words is "twenty-two million, two hundred twenty-three thousand, six hundred twenty".