18081486849 has 4 divisors (see below), whose sum is σ = 24108649136. Its totient is φ = 12054324564.

The previous prime is 18081486817. The next prime is 18081486851. The reversal of 18081486849 is 94868418081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18081486849 - 2⁵ = 18081486817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18081476849) 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, 3013581139 + ... + 3013581144.

It is an arithmetic number, because the mean of its divisors is an integer number (6027162284).

Almost surely, 2^18081486849 is an apocalyptic number.

It is an amenable number.

18081486849 is a deficient number, since it is larger than the sum of its proper divisors (6027162287).

18081486849 is an equidigital number, since it uses as much as digits as its factorization.

18081486849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6027162286.

The product of its (nonzero) digits is 3538944, while the sum is 57.

The spelling of 18081486849 in words is "eighteen billion, eighty-one million, four hundred eighty-six thousand, eight hundred forty-nine".