18677418323 has 4 divisors (see below), whose sum is σ = 19660440360. Its totient is φ = 17694396288.

The previous prime is 18677418317. The next prime is 18677418379. The reversal of 18677418323 is 32381477681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18677418323 - 2³⁴ = 1497549139 is a prime.

It is a super-2 number, since 2×18677418323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18677418223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491510990 + ... + 491511027.

It is an arithmetic number, because the mean of its divisors is an integer number (4915110090).

Almost surely, 2^18677418323 is an apocalyptic number.

18677418323 is a deficient number, since it is larger than the sum of its proper divisors (983022037).

18677418323 is an equidigital number, since it uses as much as digits as its factorization.

18677418323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983022036.

The product of its digits is 1354752, while the sum is 50.

The spelling of 18677418323 in words is "eighteen billion, six hundred seventy-seven million, four hundred eighteen thousand, three hundred twenty-three".