19420903 has 2 divisors, whose sum is σ = 19420904. Its totient is φ = 19420902.

The previous prime is 19420897. The next prime is 19420913. The reversal of 19420903 is 30902491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19420903 - 2⁵ = 19420871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19420913) 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, 9710451 + 9710452.

It is an arithmetic number, because the mean of its divisors is an integer number (9710452).

Almost surely, 2^19420903 is an apocalyptic number.

19420903 is a deficient number, since it is larger than the sum of its proper divisors (1).

19420903 is an equidigital number, since it uses as much as digits as its factorization.

19420903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19420903 is about 4406.9153611114. The cubic root of 19420903 is about 268.7962092527.

The spelling of 19420903 in words is "nineteen million, four hundred twenty thousand, nine hundred three".