11893218138 has 24 divisors (see below), whose sum is σ = 26599886976. Its totient is φ = 3836521800.

The previous prime is 11893218133. The next prime is 11893218151. The reversal of 11893218138 is 83181239811.

It is a junction number, because it is equal to n+sod(n) for n = 11893218093 and 11893218102.

It is not an unprimeable number, because it can be changed into a prime (11893218133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10656448 + ... + 10657563.

It is an arithmetic number, because the mean of its divisors is an integer number (1108328624).

Almost surely, 2^11893218138 is an apocalyptic number.

11893218138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11893218138 is an abundant number, since it is smaller than the sum of its proper divisors (14706668838).

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

11893218138 is a wasteful number, since it uses less digits than its factorization.

11893218138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21314050 (or 21314047 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The spelling of 11893218138 in words is "eleven billion, eight hundred ninety-three million, two hundred eighteen thousand, one hundred thirty-eight".