11818194918 has 16 divisors (see below), whose sum is σ = 23638858560. Its totient is φ = 3938986856.

The previous prime is 11818194881. The next prime is 11818194919. The reversal of 11818194918 is 81949181811.

It is a super-2 number, since 2×11818194918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11818194919) 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, 37428 + ... + 158231.

It is an arithmetic number, because the mean of its divisors is an integer number (1477428660).

Almost surely, 2^11818194918 is an apocalyptic number.

11818194918 is an abundant number, since it is smaller than the sum of its proper divisors (11820663642).

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

11818194918 is a wasteful number, since it uses less digits than its factorization.

11818194918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205731.

The product of its digits is 165888, while the sum is 51.

The spelling of 11818194918 in words is "eleven billion, eight hundred eighteen million, one hundred ninety-four thousand, nine hundred eighteen".