18036195874 has 4 divisors (see below), whose sum is σ = 27054293814. Its totient is φ = 9018097936.

The previous prime is 18036195833. The next prime is 18036195929. The reversal of 18036195874 is 47859163081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47859163081 = 53 ⋅903003077.

It can be written as a sum of positive squares in only one way, i.e., 17877561849 + 158634025 = 133707^2 + 12595^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4509048967 + ... + 4509048970.

Almost surely, 2^18036195874 is an apocalyptic number.

18036195874 is a deficient number, since it is larger than the sum of its proper divisors (9018097940).

18036195874 is an equidigital number, since it uses as much as digits as its factorization.

18036195874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9018097939.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 18036195874 in words is "eighteen billion, thirty-six million, one hundred ninety-five thousand, eight hundred seventy-four".