18461894678 has 8 divisors (see below), whose sum is σ = 28026490968. Its totient is φ = 9119731024.

The previous prime is 18461894669. The next prime is 18461894713. The reversal of 18461894678 is 87649816481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18461894678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55607951 + ... + 55608282.

It is an arithmetic number, because the mean of its divisors is an integer number (3503311371).

Almost surely, 2^18461894678 is an apocalyptic number.

18461894678 is a deficient number, since it is larger than the sum of its proper divisors (9564596290).

18461894678 is a wasteful number, since it uses less digits than its factorization.

18461894678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111216318.

The product of its digits is 18579456, while the sum is 62.

The spelling of 18461894678 in words is "eighteen billion, four hundred sixty-one million, eight hundred ninety-four thousand, six hundred seventy-eight".