13918047978 has 8 divisors (see below), whose sum is σ = 27836095968. Its totient is φ = 4639349324.

The previous prime is 13918047947. The next prime is 13918047989. The reversal of 13918047978 is 87974081931.

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

13918047978 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1159837326 + ... + 1159837337.

It is an arithmetic number, because the mean of its divisors is an integer number (3479511996).

Almost surely, 2^13918047978 is an apocalyptic number.

13918047978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13918047978 is a wasteful number, since it uses less digits than its factorization.

13918047978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319674668.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 13918047978 in words is "thirteen billion, nine hundred eighteen million, forty-seven thousand, nine hundred seventy-eight".