6921198118 has 4 divisors (see below), whose sum is σ = 10381797180. Its totient is φ = 3460599058.

The previous prime is 6921198113. The next prime is 6921198127. The reversal of 6921198118 is 8118911296.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921198113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1730299528 + ... + 1730299531.

It is an arithmetic number, because the mean of its divisors is an integer number (2595449295).

Almost surely, 2^6921198118 is an apocalyptic number.

6921198118 is a deficient number, since it is larger than the sum of its proper divisors (3460599062).

6921198118 is a wasteful number, since it uses less digits than its factorization.

6921198118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460599061.

The product of its digits is 62208, while the sum is 46.

The square root of 6921198118 is about 83193.7384542851. The cubic root of 6921198118 is about 1905.7258590161.

The spelling of 6921198118 in words is "six billion, nine hundred twenty-one million, one hundred ninety-eight thousand, one hundred eighteen".