13981790918 has 8 divisors (see below), whose sum is σ = 20973938040. Its totient is φ = 6990478240.

The previous prime is 13981790891. The next prime is 13981790923. The reversal of 13981790918 is 81909718931.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164888 + ... + 234843.

It is an arithmetic number, because the mean of its divisors is an integer number (2621742255).

Almost surely, 2^13981790918 is an apocalyptic number.

13981790918 is a deficient number, since it is larger than the sum of its proper divisors (6992147122).

13981790918 is a wasteful number, since it uses less digits than its factorization.

13981790918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417222.

The product of its (nonzero) digits is 979776, while the sum is 56.

The spelling of 13981790918 in words is "thirteen billion, nine hundred eighty-one million, seven hundred ninety thousand, nine hundred eighteen".