18108546671 has 2 divisors, whose sum is σ = 18108546672. Its totient is φ = 18108546670.

The previous prime is 18108546607. The next prime is 18108546679. The reversal of 18108546671 is 17664580181.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18108546671 - 2⁶ = 18108546607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18108546679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9054273335 + 9054273336.

It is an arithmetic number, because the mean of its divisors is an integer number (9054273336).

Almost surely, 2^18108546671 is an apocalyptic number.

18108546671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18108546671 is an equidigital number, since it uses as much as digits as its factorization.

18108546671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 47.

Subtracting from 18108546671 its sum of digits (47), we obtain a square (18108546624 = 134568²).

The spelling of 18108546671 in words is "eighteen billion, one hundred eight million, five hundred forty-six thousand, six hundred seventy-one".