22503531568 has 80 divisors (see below), whose sum is σ = 53102315520. Its totient is φ = 9028723968.

The previous prime is 22503531559. The next prime is 22503531593. The reversal of 22503531568 is 86513530522.

It is a self number, because there is not a number n which added to its sum of digits gives 22503531568.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28138 + ... + 214006.

It is an arithmetic number, because the mean of its divisors is an integer number (663778944).

Almost surely, 2^22503531568 is an apocalyptic number.

22503531568 is a gapful number since it is divisible by the number (28) 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 22503531568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26551157760).

22503531568 is an abundant number, since it is smaller than the sum of its proper divisors (30598783952).

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

22503531568 is a wasteful number, since it uses less digits than its factorization.

22503531568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185954 (or 185948 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 22503531568 in words is "twenty-two billion, five hundred three million, five hundred thirty-one thousand, five hundred sixty-eight".