22200020 has 24 divisors (see below), whose sum is σ = 46935168. Its totient is φ = 8820000.

The previous prime is 22200001. The next prime is 22200023. The reversal of 22200020 is 2000222.

22200020 = T₄₆₅ + T₄₆₆ + ... + T₆₁₅.

It is a junction number, because it is equal to n+sod(n) for n = 22199980 and 22200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (1955632).

Almost surely, 2^22200020 is an apocalyptic number.

22200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22200020 is an abundant number, since it is smaller than the sum of its proper divisors (24735148).

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

22200020 is a wasteful number, since it uses less digits than its factorization.

22200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7511 (or 7509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22200020 is about 4711.6897181372. The cubic root of 22200020 is about 281.0505601706.

Adding to 22200020 its reverse (2000222), we get a palindrome (24200242).

It can be divided in two parts, 2 and 2200020, that added together give a palindrome (2200022).

The spelling of 22200020 in words is "twenty-two million, two hundred thousand, twenty".