18333066979 has 4 divisors (see below), whose sum is σ = 18335802240. Its totient is φ = 18330331720.

The previous prime is 18333066971. The next prime is 18333067007. The reversal of 18333066979 is 97966033381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97966033381 = 541 ⋅181083241.

It is a cyclic number.

It is not a de Polignac number, because 18333066979 - 2³ = 18333066971 is a prime.

It is a super-2 number, since 2×18333066979² (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 (18333066971) 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 3 ways as a sum of consecutive naturals, for example, 1357552 + ... + 1370989.

It is an arithmetic number, because the mean of its divisors is an integer number (4583950560).

Almost surely, 2^18333066979 is an apocalyptic number.

18333066979 is a deficient number, since it is larger than the sum of its proper divisors (2735261).

18333066979 is an equidigital number, since it uses as much as digits as its factorization.

18333066979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735260.

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 18333066979 in words is "eighteen billion, three hundred thirty-three million, sixty-six thousand, nine hundred seventy-nine".