18386417207 has 4 divisors (see below), whose sum is σ = 18386785560. Its totient is φ = 18386048856.

The previous prime is 18386417083. The next prime is 18386417227. The reversal of 18386417207 is 70271468381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70271468381 = 9949 ⋅7063169.

It is a cyclic number.

It is not a de Polignac number, because 18386417207 - 2²⁴ = 18369639991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18386417227) 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, 94868 + ... + 213945.

It is an arithmetic number, because the mean of its divisors is an integer number (4596696390).

Almost surely, 2^18386417207 is an apocalyptic number.

18386417207 is a deficient number, since it is larger than the sum of its proper divisors (368353).

18386417207 is an equidigital number, since it uses as much as digits as its factorization.

18386417207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368352.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 18386417207 in words is "eighteen billion, three hundred eighty-six million, four hundred seventeen thousand, two hundred seven".