20012200 has 96 divisors (see below), whose sum is σ = 51559200. Its totient is φ = 7176960.

The previous prime is 20012191. The next prime is 20012203. The reversal of 20012200 is 221002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111711 + ... + 111889.

It is an arithmetic number, because the mean of its divisors is an integer number (537075).

Almost surely, 2^20012200 is an apocalyptic number.

20012200 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 20012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779600).

20012200 is an abundant number, since it is smaller than the sum of its proper divisors (31547000).

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

20012200 is a wasteful number, since it uses less digits than its factorization.

20012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20012200 is about 4473.4997485190. The cubic root of 20012200 is about 271.4969435989.

Adding to 20012200 its reverse (221002), we get a palindrome (20233202).

The spelling of 20012200 in words is "twenty million, twelve thousand, two hundred".