20312203 has 8 divisors (see below), whose sum is σ = 20647440. Its totient is φ = 19979520.

The previous prime is 20312191. The next prime is 20312213. The reversal of 20312203 is 30221302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312203 - 2¹⁷ = 20181131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20976 + ... + 21922.

It is an arithmetic number, because the mean of its divisors is an integer number (2580930).

Almost surely, 2^20312203 is an apocalyptic number.

20312203 is a deficient number, since it is larger than the sum of its proper divisors (335237).

20312203 is an equidigital number, since it uses as much as digits as its factorization.

20312203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20312203 is about 4506.9061450179. The cubic root of 20312203 is about 272.8468909385.

Adding to 20312203 its reverse (30221302), we get a palindrome (50533505).

Subtracting 20312203 from its reverse (30221302), we obtain a palindrome (9909099).

The spelling of 20312203 in words is "twenty million, three hundred twelve thousand, two hundred three".