20040173603 has 4 divisors (see below), whose sum is σ = 20686630848. Its totient is φ = 19393716360.

The previous prime is 20040173467. The next prime is 20040173609. The reversal of 20040173603 is 30637104002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20040173603 - 2¹² = 20040169507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20040173609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323228576 + ... + 323228637.

It is an arithmetic number, because the mean of its divisors is an integer number (5171657712).

Almost surely, 2^20040173603 is an apocalyptic number.

20040173603 is a deficient number, since it is larger than the sum of its proper divisors (646457245).

20040173603 is an equidigital number, since it uses as much as digits as its factorization.

20040173603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646457244.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 20040173603 its reverse (30637104002), we get a palindrome (50677277605).

The spelling of 20040173603 in words is "twenty billion, forty million, one hundred seventy-three thousand, six hundred three".