13918091994 has 24 divisors (see below), whose sum is σ = 30857166912. Its totient is φ = 4531471560.

The previous prime is 13918091963. The next prime is 13918092017. The reversal of 13918091994 is 49919081931.

13918091994 is a `hidden beast` number, since 1 + 391 + 80 + 91 + 9 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13918091994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8990242 + ... + 8991789.

It is an arithmetic number, because the mean of its divisors is an integer number (1285715288).

Almost surely, 2^13918091994 is an apocalyptic number.

13918091994 is an abundant number, since it is smaller than the sum of its proper divisors (16939074918).

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

13918091994 is a wasteful number, since it uses less digits than its factorization.

13918091994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982082 (or 17982079 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The spelling of 13918091994 in words is "thirteen billion, nine hundred eighteen million, ninety-one thousand, nine hundred ninety-four".