19423903 has 6 divisors (see below), whose sum is σ = 19722696. Its totient is φ = 19129572.

The previous prime is 19423897. The next prime is 19423919. The reversal of 19423903 is 30932491.

It is not a de Polignac number, because 19423903 - 2¹⁷ = 19292831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19423933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2326 + ... + 6652.

It is an arithmetic number, because the mean of its divisors is an integer number (3287116).

Almost surely, 2^19423903 is an apocalyptic number.

19423903 is a deficient number, since it is larger than the sum of its proper divisors (298793).

19423903 is an frugal number, since it uses more digits than its factorization.

19423903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461 (or 4394 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 19423903 is about 4407.2557221019. The cubic root of 19423903 is about 268.8100491020.

The spelling of 19423903 in words is "nineteen million, four hundred twenty-three thousand, nine hundred three".