18120492844 has 6 divisors (see below), whose sum is σ = 31710862484. Its totient is φ = 9060246420.

The previous prime is 18120492779. The next prime is 18120492857. The reversal of 18120492844 is 44829402181.

It is a self number, because there is not a number n which added to its sum of digits gives 18120492844.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265061602 + ... + 2265061609.

Almost surely, 2^18120492844 is an apocalyptic number.

It is an amenable number.

18120492844 is a deficient number, since it is larger than the sum of its proper divisors (13590369640).

18120492844 is a wasteful number, since it uses less digits than its factorization.

18120492844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530123215 (or 4530123213 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 18120492844 in words is "eighteen billion, one hundred twenty million, four hundred ninety-two thousand, eight hundred forty-four".