22005450 has 72 divisors (see below), whose sum is σ = 59966400. Its totient is φ = 5784480.

The previous prime is 22005449. The next prime is 22005499. The reversal of 22005450 is 5450022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35241 + ... + 35859.

Almost surely, 2^22005450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22005450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29983200).

22005450 is an abundant number, since it is smaller than the sum of its proper divisors (37960950).

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

22005450 is a wasteful number, since it uses less digits than its factorization.

22005450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22005450 is about 4690.9966957993. The cubic root of 22005450 is about 280.2270692072.

Adding to 22005450 its reverse (5450022), we get a palindrome (27455472).

The spelling of 22005450 in words is "twenty-two million, five thousand, four hundred fifty".