18181486147 has 8 divisors (see below), whose sum is σ = 19867803120. Its totient is φ = 16500744960.

The previous prime is 18181486139. The next prime is 18181486151. The reversal of 18181486147 is 74168418181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18181486147 - 2³ = 18181486139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18181486147.

It is not an unprimeable number, because it can be changed into a prime (18181486187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387122 + ... + 1400167.

It is an arithmetic number, because the mean of its divisors is an integer number (2483475390).

Almost surely, 2^18181486147 is an apocalyptic number.

18181486147 is a deficient number, since it is larger than the sum of its proper divisors (1686316973).

18181486147 is a wasteful number, since it uses less digits than its factorization.

18181486147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787893.

The product of its digits is 344064, while the sum is 49.

The spelling of 18181486147 in words is "eighteen billion, one hundred eighty-one million, four hundred eighty-six thousand, one hundred forty-seven".