22243420 has 12 divisors (see below), whose sum is σ = 46711224. Its totient is φ = 8897360.

The previous prime is 22243393. The next prime is 22243423. The reversal of 22243420 is 2434222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22243423) 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, 556066 + ... + 556105.

It is an arithmetic number, because the mean of its divisors is an integer number (3892602).

Almost surely, 2^22243420 is an apocalyptic number.

22243420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22243420 is an abundant number, since it is smaller than the sum of its proper divisors (24467804).

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

22243420 is a wasteful number, since it uses less digits than its factorization.

22243420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112180 (or 1112178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22243420 is about 4716.2930358492. The cubic root of 22243420 is about 281.2335878489.

Adding to 22243420 its reverse (2434222), we get a palindrome (24677642).

It can be divided in two parts, 2 and 2243420, that added together give a palindrome (2243422).

The spelling of 22243420 in words is "twenty-two million, two hundred forty-three thousand, four hundred twenty".