11957436218 has 32 divisors (see below), whose sum is σ = 22080764160. Its totient is φ = 4729236480.

The previous prime is 11957436191. The next prime is 11957436233. The reversal of 11957436218 is 81263475911.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1283738 + ... + 1293018.

It is an arithmetic number, because the mean of its divisors is an integer number (690023880).

Almost surely, 2^11957436218 is an apocalyptic number.

11957436218 is a deficient number, since it is larger than the sum of its proper divisors (10123327942).

11957436218 is a wasteful number, since it uses less digits than its factorization.

11957436218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16382.

The product of its digits is 362880, while the sum is 47.

The spelling of 11957436218 in words is "eleven billion, nine hundred fifty-seven million, four hundred thirty-six thousand, two hundred eighteen".