18109041067 has 4 divisors (see below), whose sum is σ = 19502044240. Its totient is φ = 16716037896.

The previous prime is 18109041059. The next prime is 18109041073. The reversal of 18109041067 is 76014090181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76014090181 = 64781 ⋅1173401.

It is a cyclic number.

It is not a de Polignac number, because 18109041067 - 2³ = 18109041059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18109021067) 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, 696501567 + ... + 696501592.

It is an arithmetic number, because the mean of its divisors is an integer number (4875511060).

Almost surely, 2^18109041067 is an apocalyptic number.

18109041067 is a deficient number, since it is larger than the sum of its proper divisors (1393003173).

18109041067 is a wasteful number, since it uses less digits than its factorization.

18109041067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393003172.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 18109041067 in words is "eighteen billion, one hundred nine million, forty-one thousand, sixty-seven".