22554720 has 192 divisors, whose sum is σ = 82736640. Its totient is φ = 5727744.

The previous prime is 22554713. The next prime is 22554739. The reversal of 22554720 is 2745522.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99247 + ... + 99473.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^22554720 is an apocalyptic number.

22554720 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 22554720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41368320).

22554720 is an abundant number, since it is smaller than the sum of its proper divisors (60181920).

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

22554720 is a wasteful number, since it uses less digits than its factorization.

22554720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 22554720 is about 4749.1809820221. The cubic root of 22554720 is about 282.5394833477.

It can be divided in two parts, 225 and 54720, that added together give a palindrome (54945).

The spelling of 22554720 in words is "twenty-two million, five hundred fifty-four thousand, seven hundred twenty".