20473171603 has 4 divisors (see below), whose sum is σ = 20485679760. Its totient is φ = 20460663448.

The previous prime is 20473171601. The next prime is 20473171637. The reversal of 20473171603 is 30617137402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30617137402 = 2 ⋅15308568701.

It is a cyclic number.

It is not a de Polignac number, because 20473171603 - 2¹ = 20473171601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20473171601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6251623 + ... + 6254896.

It is an arithmetic number, because the mean of its divisors is an integer number (5121419940).

Almost surely, 2^20473171603 is an apocalyptic number.

20473171603 is a deficient number, since it is larger than the sum of its proper divisors (12508157).

20473171603 is a wasteful number, since it uses less digits than its factorization.

20473171603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12508156.

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 20473171603 in words is "twenty billion, four hundred seventy-three million, one hundred seventy-one thousand, six hundred three".