20442203 has 2 divisors, whose sum is σ = 20442204. Its totient is φ = 20442202.

The previous prime is 20442179. The next prime is 20442269. The reversal of 20442203 is 30224402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20442203 - 2⁸ = 20441947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20442293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221101 + 10221102.

It is an arithmetic number, because the mean of its divisors is an integer number (10221102).

Almost surely, 2^20442203 is an apocalyptic number.

20442203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442203 is an equidigital number, since it uses as much as digits as its factorization.

20442203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20442203 is about 4521.3054530744. The cubic root of 20442203 is about 273.4277354206.

Adding to 20442203 its reverse (30224402), we get a palindrome (50666605).

The spelling of 20442203 in words is "twenty million, four hundred forty-two thousand, two hundred three".