22423220 has 24 divisors (see below), whose sum is σ = 47755008. Its totient is φ = 8842400.

The previous prime is 22423217. The next prime is 22423223. The reversal of 22423220 is 2232422.

It is an interprime number because it is at equal distance from previous prime (22423217) and next prime (22423223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22423223) 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, 6476 + ... + 9315.

It is an arithmetic number, because the mean of its divisors is an integer number (1989792).

Almost surely, 2^22423220 is an apocalyptic number.

22423220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22423220 is an abundant number, since it is smaller than the sum of its proper divisors (25331788).

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

22423220 is a wasteful number, since it uses less digits than its factorization.

22423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871 (or 15869 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22423220 is about 4735.3162513184. The cubic root of 22423220 is about 281.9893193815.

Adding to 22423220 its reverse (2232422), we get a palindrome (24655642).

The spelling of 22423220 in words is "twenty-two million, four hundred twenty-three thousand, two hundred twenty".