22020000 has 120 divisors (see below), whose sum is σ = 72426816. Its totient is φ = 5856000.

The previous prime is 22019989. The next prime is 22020023. The reversal of 22020000 is 2022.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59817 + ... + 60183.

Almost surely, 2^22020000 is an apocalyptic number.

22020000 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 22020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36213408).

22020000 is an abundant number, since it is smaller than the sum of its proper divisors (50406816).

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

22020000 is an equidigital number, since it uses as much as digits as its factorization.

22020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 22020000 is about 4692.5472826600. The cubic root of 22020000 is about 280.2888176309.

Adding to 22020000 its reverse (2022), we get a palindrome (22022022).

The spelling of 22020000 in words is "twenty-two million, twenty thousand".