16840327818 has 16 divisors (see below), whose sum is σ = 35145032256. Its totient is φ = 5369379840.

The previous prime is 16840327813. The next prime is 16840327843. The reversal of 16840327818 is 81872304861.

It is a super-2 number, since 2×16840327818² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16840327813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61015543 + ... + 61015818.

It is an arithmetic number, because the mean of its divisors is an integer number (2196564516).

Almost surely, 2^16840327818 is an apocalyptic number.

16840327818 is an abundant number, since it is smaller than the sum of its proper divisors (18304704438).

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

16840327818 is a wasteful number, since it uses less digits than its factorization.

16840327818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122031389.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 16840327818 in words is "sixteen billion, eight hundred forty million, three hundred twenty-seven thousand, eight hundred eighteen".