20317734473 has 4 divisors (see below), whose sum is σ = 20318969748. Its totient is φ = 20316499200.

The previous prime is 20317734461. The next prime is 20317734487. The reversal of 20317734473 is 37443771302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19479226624 + 838507849 = 139568^2 + 28957^2 .

It is a cyclic number.

It is not a de Polignac number, because 20317734473 - 2¹⁴ = 20317718089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20317734473.

It is not an unprimeable number, because it can be changed into a prime (20317734403) 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 3 ways as a sum of consecutive naturals, for example, 592628 + ... + 625973.

It is an arithmetic number, because the mean of its divisors is an integer number (5079742437).

Almost surely, 2^20317734473 is an apocalyptic number.

It is an amenable number.

20317734473 is a deficient number, since it is larger than the sum of its proper divisors (1235275).

20317734473 is a wasteful number, since it uses less digits than its factorization.

20317734473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235274.

The product of its (nonzero) digits is 296352, while the sum is 41.

The spelling of 20317734473 in words is "twenty billion, three hundred seventeen million, seven hundred thirty-four thousand, four hundred seventy-three".