20021203 has 2 divisors, whose sum is σ = 20021204. Its totient is φ = 20021202.

The previous prime is 20021171. The next prime is 20021213. The reversal of 20021203 is 30212002.

It is an a-pointer prime, because the next prime (20021213) can be obtained adding 20021203 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021203 - 2⁵ = 20021171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021203.

It is not a weakly prime, because it can be changed into another prime (20021213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010601 + 10010602.

It is an arithmetic number, because the mean of its divisors is an integer number (10010602).

Almost surely, 2^20021203 is an apocalyptic number.

20021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021203 is an equidigital number, since it uses as much as digits as its factorization.

20021203 is an evil number, because the sum of its binary digits is even.

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

The square root of 20021203 is about 4474.5058945095. The cubic root of 20021203 is about 271.5376507764.

Adding to 20021203 its reverse (30212002), we get a palindrome (50233205).

The spelling of 20021203 in words is "twenty million, twenty-one thousand, two hundred three".