18691853873 has 16 divisors (see below), whose sum is σ = 23319881856. Its totient is φ = 14555235840.

The previous prime is 18691853863. The next prime is 18691853927. The reversal of 18691853873 is 37835819681.

It is a cyclic number.

It is not a de Polignac number, because 18691853873 - 2⁴ = 18691853857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18691853833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33665 + ... + 196257.

It is an arithmetic number, because the mean of its divisors is an integer number (1457492616).

Almost surely, 2^18691853873 is an apocalyptic number.

It is an amenable number.

18691853873 is a deficient number, since it is larger than the sum of its proper divisors (4628027983).

18691853873 is a wasteful number, since it uses less digits than its factorization.

18691853873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164104.

The product of its digits is 8709120, while the sum is 59.

The spelling of 18691853873 in words is "eighteen billion, six hundred ninety-one million, eight hundred fifty-three thousand, eight hundred seventy-three".