22504818 has 48 divisors (see below), whose sum is σ = 53663904. Its totient is φ = 6269760.

The previous prime is 22504793. The next prime is 22504837. The reversal of 22504818 is 81840522.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11121 + ... + 12987.

It is an arithmetic number, because the mean of its divisors is an integer number (1117998).

Almost surely, 2^22504818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22504818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26831952).

22504818 is an abundant number, since it is smaller than the sum of its proper divisors (31159086).

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

22504818 is a wasteful number, since it uses less digits than its factorization.

22504818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 22504818 is about 4743.9243248602. The cubic root of 22504818 is about 282.3309579443.

The spelling of 22504818 in words is "twenty-two million, five hundred four thousand, eight hundred eighteen".