22000900 has 18 divisors (see below), whose sum is σ = 47742170. Its totient is φ = 8800320.

The previous prime is 22000897. The next prime is 22000919. The reversal of 22000900 is 900022.

It can be written as a sum of positive squares in 3 ways, for example, as 248004 + 21752896 = 498^2 + 4664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109905 + ... + 110104.

Almost surely, 2^22000900 is an apocalyptic number.

22000900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000900 is an abundant number, since it is smaller than the sum of its proper divisors (25741270).

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

22000900 is a wasteful number, since it uses less digits than its factorization.

22000900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220023 (or 220016 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 22000900 is about 4690.5116991646. The cubic root of 22000900 is about 280.2077539762.

Adding to 22000900 its reverse (900022), we get a palindrome (22900922).

The spelling of 22000900 in words is "twenty-two million, nine hundred", and thus it is an aban number.