22451220400 has 120 divisors (see below), whose sum is σ = 61688265984. Its totient is φ = 7692115200.

The previous prime is 22451220383. The next prime is 22451220433. The reversal of 22451220400 is 402215422.

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, 7454895 + ... + 7457905.

Almost surely, 2^22451220400 is an apocalyptic number.

22451220400 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 22451220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30844132992).

22451220400 is an abundant number, since it is smaller than the sum of its proper divisors (39237045584).

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

22451220400 is a wasteful number, since it uses less digits than its factorization.

22451220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699 (or 5688 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 22451220400 its reverse (402215422), we get a palindrome (22853435822).

The spelling of 22451220400 in words is "twenty-two billion, four hundred fifty-one million, two hundred twenty thousand, four hundred".