22145504000 has 144 divisors (see below), whose sum is σ = 57567706560. Its totient is φ = 8472780800.

The previous prime is 22145503999. The next prime is 22145504021. The reversal of 22145504000 is 40554122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 720956 + ... + 751044.

It is an arithmetic number, because the mean of its divisors is an integer number (399775740).

Almost surely, 2^22145504000 is an apocalyptic number.

22145504000 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 22145504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28783853280).

22145504000 is an abundant number, since it is smaller than the sum of its proper divisors (35422202560).

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

22145504000 is an equidigital number, since it uses as much as digits as its factorization.

22145504000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30143 (or 30119 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The spelling of 22145504000 in words is "twenty-two billion, one hundred forty-five million, five hundred four thousand".