20312200 has 24 divisors (see below), whose sum is σ = 47226330. Its totient is φ = 8124800.

The previous prime is 20312191. The next prime is 20312213. The reversal of 20312200 is 221302.

It can be written as a sum of positive squares in 3 ways, for example, as 9036036 + 11276164 = 3006^2 + 3358^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 50581 + ... + 50980.

Almost surely, 2^20312200 is an apocalyptic number.

20312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312200 is an abundant number, since it is smaller than the sum of its proper divisors (26914130).

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

20312200 is a wasteful number, since it uses less digits than its factorization.

20312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101577 (or 101568 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20312200 is about 4506.9058121953. The cubic root of 20312200 is about 272.8468775059.

Adding to 20312200 its reverse (221302), we get a palindrome (20533502).

It can be divided in two parts, 203 and 12200, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 20312200 in words is "twenty million, three hundred twelve thousand, two hundred".