20018672017 has 8 divisors (see below), whose sum is σ = 20497726080. Its totient is φ = 19545093120.

The previous prime is 20018671927. The next prime is 20018672027. The reversal of 20018672017 is 71027681002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20018672017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20018672027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361392 + ... + 1376017.

It is an arithmetic number, because the mean of its divisors is an integer number (2562215760).

Almost surely, 2^20018672017 is an apocalyptic number.

It is an amenable number.

20018672017 is a deficient number, since it is larger than the sum of its proper divisors (479054063).

20018672017 is a wasteful number, since it uses less digits than its factorization.

20018672017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737583.

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 20018672017 in words is "twenty billion, eighteen million, six hundred seventy-two thousand, seventeen".