22563640 has 64 divisors (see below), whose sum is σ = 58320000. Its totient is φ = 7770240.

The previous prime is 22563631. The next prime is 22563649. The reversal of 22563640 is 4636522.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22563631) and next prime (22563649).

It is a junction number, because it is equal to n+sod(n) for n = 22563599 and 22563608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22563649) 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 15 ways as a sum of consecutive naturals, for example, 7011 + ... + 9709.

It is an arithmetic number, because the mean of its divisors is an integer number (911250).

Almost surely, 2^22563640 is an apocalyptic number.

22563640 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 22563640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29160000).

22563640 is an abundant number, since it is smaller than the sum of its proper divisors (35756360).

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

22563640 is a wasteful number, since it uses less digits than its factorization.

22563640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 22563640 is about 4750.1199984842. The cubic root of 22563640 is about 282.5767249247.

The spelling of 22563640 in words is "twenty-two million, five hundred sixty-three thousand, six hundred forty".