18361336478 has 8 divisors (see below), whose sum is σ = 27542712360. Its totient is φ = 9180432360.

The previous prime is 18361336463. The next prime is 18361336501. The reversal of 18361336478 is 87463316381.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4988 + ... + 191696.

It is an arithmetic number, because the mean of its divisors is an integer number (3442839045).

Almost surely, 2^18361336478 is an apocalyptic number.

18361336478 is a deficient number, since it is larger than the sum of its proper divisors (9181375882).

18361336478 is a wasteful number, since it uses less digits than its factorization.

18361336478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235882.

The product of its digits is 1741824, while the sum is 50.

The spelling of 18361336478 in words is "eighteen billion, three hundred sixty-one million, three hundred thirty-six thousand, four hundred seventy-eight".