20317852945 has 8 divisors (see below), whose sum is σ = 26256917736. Its totient is φ = 15003952896.

The previous prime is 20317852937. The next prime is 20317852967. The reversal of 20317852945 is 54925871302.

20317852945 = 100791² + 100792².

It can be written as a sum of positive squares in 4 ways, for example, as 1271920896 + 19045932049 = 35664^2 + 138007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20317852945 - 2³ = 20317852937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20317852895 and 20317852904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156291112 + ... + 156291241.

It is an arithmetic number, because the mean of its divisors is an integer number (3282114717).

Almost surely, 2^20317852945 is an apocalyptic number.

20317852945 is the 100792-nd centered square number.

It is an amenable number.

20317852945 is a deficient number, since it is larger than the sum of its proper divisors (5939064791).

20317852945 is a wasteful number, since it uses less digits than its factorization.

20317852945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312582371.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 20317852945 in words is "twenty billion, three hundred seventeen million, eight hundred fifty-two thousand, nine hundred forty-five".