20039903 has 16 divisors (see below), whose sum is σ = 22561056. Its totient is φ = 17677440.

The previous prime is 20039893. The next prime is 20039933. The reversal of 20039903 is 30993002.

It is a cyclic number.

It is not a de Polignac number, because 20039903 - 2¹⁴ = 20023519 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 (20039933) 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, 29000 + ... + 29682.

It is an arithmetic number, because the mean of its divisors is an integer number (1410066).

Almost surely, 2^20039903 is an apocalyptic number.

20039903 is a deficient number, since it is larger than the sum of its proper divisors (2521153).

20039903 is a wasteful number, since it uses less digits than its factorization.

20039903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 20039903 is about 4476.5950230058. The cubic root of 20039903 is about 271.6221640796.

The spelling of 20039903 in words is "twenty million, thirty-nine thousand, nine hundred three".