16091918 has 8 divisors (see below), whose sum is σ = 24230448. Its totient is φ = 8015104.

The previous prime is 16091899. The next prime is 16091923. The reversal of 16091918 is 81919061.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14771 + ... + 15822.

It is an arithmetic number, because the mean of its divisors is an integer number (3028806).

Almost surely, 2^16091918 is an apocalyptic number.

16091918 is a deficient number, since it is larger than the sum of its proper divisors (8138530).

16091918 is a wasteful number, since it uses less digits than its factorization.

16091918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30858.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 16091918 is about 4011.4732954365. The cubic root of 16091918 is about 252.4658281371.

The spelling of 16091918 in words is "sixteen million, ninety-one thousand, nine hundred eighteen".