22454420 has 12 divisors (see below), whose sum is σ = 47154324. Its totient is φ = 8981760.

The previous prime is 22454387. The next prime is 22454431. The reversal of 22454420 is 2445422.

It can be written as a sum of positive squares in 2 ways, for example, as 7739524 + 14714896 = 2782^2 + 3836^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561341 + ... + 561380.

It is an arithmetic number, because the mean of its divisors is an integer number (3929527).

Almost surely, 2^22454420 is an apocalyptic number.

22454420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22454420 is an abundant number, since it is smaller than the sum of its proper divisors (24699904).

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

22454420 is a wasteful number, since it uses less digits than its factorization.

22454420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122730 (or 1122728 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 22454420 is about 4738.6095006869. The cubic root of 22454420 is about 282.1200468050.

Adding to 22454420 its reverse (2445422), we get a palindrome (24899842).

The spelling of 22454420 in words is "twenty-two million, four hundred fifty-four thousand, four hundred twenty".