18481394434 has 8 divisors (see below), whose sum is σ = 28616352768. Its totient is φ = 8942610180.

The previous prime is 18481394423. The next prime is 18481394461. The reversal of 18481394434 is 43449318481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149043442 + ... + 149043565.

It is an arithmetic number, because the mean of its divisors is an integer number (3577044096).

Almost surely, 2^18481394434 is an apocalyptic number.

18481394434 is a deficient number, since it is larger than the sum of its proper divisors (10134958334).

18481394434 is a wasteful number, since it uses less digits than its factorization.

18481394434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298087040.

The product of its digits is 1327104, while the sum is 49.

The spelling of 18481394434 in words is "eighteen billion, four hundred eighty-one million, three hundred ninety-four thousand, four hundred thirty-four".