16235381918 has 32 divisors (see below), whose sum is σ = 27989902080. Its totient is φ = 6918629760.

The previous prime is 16235381909. The next prime is 16235381923. The reversal of 16235381918 is 81918353261.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4585793 + ... + 4589331.

It is an arithmetic number, because the mean of its divisors is an integer number (874684440).

Almost surely, 2^16235381918 is an apocalyptic number.

16235381918 is a deficient number, since it is larger than the sum of its proper divisors (11754520162).

16235381918 is a wasteful number, since it uses less digits than its factorization.

16235381918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312.

The product of its digits is 311040, while the sum is 47.

The spelling of 16235381918 in words is "sixteen billion, two hundred thirty-five million, three hundred eighty-one thousand, nine hundred eighteen".