18676545656873 has 16 divisors (see below), whose sum is σ = 20128951906560. Its totient is φ = 17226391074816.

The previous prime is 18676545656707. The next prime is 18676545656893. The reversal of 18676545656873 is 37865654567681.

It is a cyclic number.

It is not a de Polignac number, because 18676545656873 - 2⁸ = 18676545656617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18676545656794 and 18676545656803.

It is not an unprimeable number, because it can be changed into a prime (18676545656893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329439536 + ... + 329496222.

It is an arithmetic number, because the mean of its divisors is an integer number (1258059494160).

Almost surely, 2^{18676545656873} is an apocalyptic number.

18676545656873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18676545656873 is a deficient number, since it is larger than the sum of its proper divisors (1452406249687).

18676545656873 is a wasteful number, since it uses less digits than its factorization.

18676545656873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76096.

The product of its digits is 6096384000, while the sum is 77.

The spelling of 18676545656873 in words is "eighteen trillion, six hundred seventy-six billion, five hundred forty-five million, six hundred fifty-six thousand, eight hundred seventy-three".