19944903 has 16 divisors (see below), whose sum is σ = 29088000. Its totient is φ = 12055680.

The previous prime is 19944877. The next prime is 19944913. The reversal of 19944903 is 30944991.

It is not a de Polignac number, because 19944903 - 2⁹ = 19944391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19263 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (1818000).

Almost surely, 2^19944903 is an apocalyptic number.

19944903 is a deficient number, since it is larger than the sum of its proper divisors (9143097).

19944903 is a wasteful number, since it uses less digits than its factorization.

19944903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 19944903 is about 4465.9716747870. The cubic root of 19944903 is about 271.1922719711.

The spelling of 19944903 in words is "nineteen million, nine hundred forty-four thousand, nine hundred three".