20040903 has 6 divisors (see below), whose sum is σ = 28947984. Its totient is φ = 13360596.

The previous prime is 20040901. The next prime is 20040913. The reversal of 20040903 is 30904002.

It is not a de Polignac number, because 20040903 - 2¹ = 20040901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040901) 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 in 5 ways as a sum of consecutive naturals, for example, 1113375 + ... + 1113392.

It is an arithmetic number, because the mean of its divisors is an integer number (4824664).

Almost surely, 2^20040903 is an apocalyptic number.

20040903 is a deficient number, since it is larger than the sum of its proper divisors (8907081).

20040903 is a wasteful number, since it uses less digits than its factorization.

20040903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226773 (or 2226770 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20040903 is about 4476.7067136456. The cubic root of 20040903 is about 271.6266820264.

Adding to 20040903 its reverse (30904002), we get a palindrome (50944905).

The spelling of 20040903 in words is "twenty million, forty thousand, nine hundred three".