16418891918 has 32 divisors (see below), whose sum is σ = 30192003072. Its totient is φ = 6589519200.

The previous prime is 16418891917. The next prime is 16418891953. The reversal of 16418891918 is 81919881461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16418891917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241438 + ... + 1254593.

It is an arithmetic number, because the mean of its divisors is an integer number (943500096).

Almost surely, 2^16418891918 is an apocalyptic number.

16418891918 is a deficient number, since it is larger than the sum of its proper divisors (13773111154).

16418891918 is a wasteful number, since it uses less digits than its factorization.

16418891918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496080.

The product of its digits is 995328, while the sum is 56.

The spelling of 16418891918 in words is "sixteen billion, four hundred eighteen million, eight hundred ninety-one thousand, nine hundred eighteen".