22563900 has 144 divisors (see below), whose sum is σ = 74266080. Its totient is φ = 5875200.

The previous prime is 22563859. The next prime is 22563907. The reversal of 22563900 is 936522.

22563900 is a `hidden beast` number, since 2 + 25 + 639 + 0 + 0 = 666.

22563900 is nontrivially palindromic in base 14.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22563907) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 164632 + ... + 164768.

Almost surely, 2^22563900 is an apocalyptic number.

22563900 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 22563900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37133040).

22563900 is an abundant number, since it is smaller than the sum of its proper divisors (51702180).

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

22563900 is a wasteful number, since it uses less digits than its factorization.

22563900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 22563900 is about 4750.1473661351. The cubic root of 22563900 is about 282.5778102943.

The spelling of 22563900 in words is "twenty-two million, five hundred sixty-three thousand, nine hundred".