22541820 has 96 divisors (see below), whose sum is σ = 72769536. Its totient is φ = 5107200.

The previous prime is 22541807. The next prime is 22541833. The reversal of 22541820 is 2814522.

It is an interprime number because it is at equal distance from previous prime (22541807) and next prime (22541833).

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, 80080 + ... + 80360.

It is an arithmetic number, because the mean of its divisors is an integer number (758016).

Almost surely, 2^22541820 is an apocalyptic number.

22541820 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 22541820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36384768).

22541820 is an abundant number, since it is smaller than the sum of its proper divisors (50227716).

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

22541820 is a wasteful number, since it uses less digits than its factorization.

22541820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22541820 is about 4747.8226588616. The cubic root of 22541820 is about 282.4856076412.

The spelling of 22541820 in words is "twenty-two million, five hundred forty-one thousand, eight hundred twenty".