18448819137 has 36 divisors (see below), whose sum is σ = 31135764816. Its totient is φ = 10495684080.

The previous prime is 18448819127. The next prime is 18448819153. The reversal of 18448819137 is 73191884481.

18448819137 is a `hidden beast` number, since 1 + 8 + 448 + 8 + 191 + 3 + 7 = 666.

It is not a de Polignac number, because 18448819137 - 2⁷ = 18448819009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18448819127) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7962 + ... + 192252.

It is an arithmetic number, because the mean of its divisors is an integer number (864882356).

Almost surely, 2^18448819137 is an apocalyptic number.

It is an amenable number.

18448819137 is a deficient number, since it is larger than the sum of its proper divisors (12686945679).

18448819137 is a wasteful number, since it uses less digits than its factorization.

18448819137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184538 (or 184528 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 18448819137 in words is "eighteen billion, four hundred forty-eight million, eight hundred nineteen thousand, one hundred thirty-seven".