20489303 has 2 divisors, whose sum is σ = 20489304. Its totient is φ = 20489302.

The previous prime is 20489281. The next prime is 20489311. The reversal of 20489303 is 30398402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20489303 - 2¹⁴ = 20472919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20489363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244651 + 10244652.

It is an arithmetic number, because the mean of its divisors is an integer number (10244652).

Almost surely, 2^20489303 is an apocalyptic number.

20489303 is a deficient number, since it is larger than the sum of its proper divisors (1).

20489303 is an equidigital number, since it uses as much as digits as its factorization.

20489303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20489303 is about 4526.5111288939. The cubic root of 20489303 is about 273.6375720363.

Subtracting 20489303 from its reverse (30398402), we obtain a palindrome (9909099).

The spelling of 20489303 in words is "twenty million, four hundred eighty-nine thousand, three hundred three".