22554420 has 96 divisors (see below), whose sum is σ = 73156608. Its totient is φ = 5085312.

The previous prime is 22554419. The next prime is 22554449. The reversal of 22554420 is 2445522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34537 + ... + 35183.

It is an arithmetic number, because the mean of its divisors is an integer number (762048).

Almost surely, 2^22554420 is an apocalyptic number.

22554420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22554420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36578304).

22554420 is an abundant number, since it is smaller than the sum of its proper divisors (50602188).

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

22554420 is a wasteful number, since it uses less digits than its factorization.

22554420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 22554420 is about 4749.1493975237. The cubic root of 22554420 is about 282.5382306576.

Adding to 22554420 its reverse (2445522), we get a palindrome (24999942).

It can be divided in two parts, 225 and 54420, that added together give a palindrome (54645).

The spelling of 22554420 in words is "twenty-two million, five hundred fifty-four thousand, four hundred twenty".