20604002003 has 16 divisors (see below), whose sum is σ = 22810057536. Its totient is φ = 18487647360.

The previous prime is 20604001993. The next prime is 20604002009. The reversal of 20604002003 is 30020040602.

It is not a de Polignac number, because 20604002003 - 2²⁸ = 20335566547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20604002009) 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, 506138 + ... + 545328.

It is an arithmetic number, because the mean of its divisors is an integer number (1425628596).

Almost surely, 2^20604002003 is an apocalyptic number.

20604002003 is a deficient number, since it is larger than the sum of its proper divisors (2206055533).

20604002003 is a wasteful number, since it uses less digits than its factorization.

20604002003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40334.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20604002003 its reverse (30020040602), we get a palindrome (50624042605).

The spelling of 20604002003 in words is "twenty billion, six hundred four million, two thousand, three".