20228903 has 2 divisors, whose sum is σ = 20228904. Its totient is φ = 20228902.

The previous prime is 20228869. The next prime is 20228927. The reversal of 20228903 is 30982202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20228903 - 2⁶ = 20228839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20228953) 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 as a sum of consecutive naturals, namely, 10114451 + 10114452.

It is an arithmetic number, because the mean of its divisors is an integer number (10114452).

Almost surely, 2^20228903 is an apocalyptic number.

20228903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20228903 is an equidigital number, since it uses as much as digits as its factorization.

20228903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20228903 is about 4497.6552780310. The cubic root of 20228903 is about 272.4733997546.

The spelling of 20228903 in words is "twenty million, two hundred twenty-eight thousand, nine hundred three".