22503522400 has 144 divisors (see below), whose sum is σ = 56831550048. Its totient is φ = 8695296000.

The previous prime is 22503522389. The next prime is 22503522409. The reversal of 22503522400 is 422530522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22503522409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3375070 + ... + 3381730.

It is an arithmetic number, because the mean of its divisors is an integer number (394663542).

Almost surely, 2^22503522400 is an apocalyptic number.

22503522400 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 22503522400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28415775024).

22503522400 is an abundant number, since it is smaller than the sum of its proper divisors (34328027648).

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

22503522400 is a wasteful number, since it uses less digits than its factorization.

22503522400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6825 (or 6812 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The spelling of 22503522400 in words is "twenty-two billion, five hundred three million, five hundred twenty-two thousand, four hundred".