18673866233 has 6 divisors (see below), whose sum is σ = 20525820042. Its totient is φ = 16976241920.

The previous prime is 18673866199. The next prime is 18673866301. The reversal of 18673866233 is 33266837681.

It can be written as a sum of positive squares in only one way, i.e., 12569100544 + 6104765689 = 112112^2 + 78133^2 .

It is not a de Polignac number, because 18673866233 - 2¹⁴ = 18673849849 is a prime.

It is a super-2 number, since 2×18673866233² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18673866433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77164616 + ... + 77164857.

It is an arithmetic number, because the mean of its divisors is an integer number (3420970007).

Almost surely, 2^18673866233 is an apocalyptic number.

It is an amenable number.

18673866233 is a deficient number, since it is larger than the sum of its proper divisors (1851953809).

18673866233 is a wasteful number, since it uses less digits than its factorization.

18673866233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154329495 (or 154329484 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The spelling of 18673866233 in words is "eighteen billion, six hundred seventy-three million, eight hundred sixty-six thousand, two hundred thirty-three".