11267856218 has 4 divisors (see below), whose sum is σ = 16901784330. Its totient is φ = 5633928108.

The previous prime is 11267856217. The next prime is 11267856247. The reversal of 11267856218 is 81265876211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81265876211 = 13 ⋅6251221247.

It can be written as a sum of positive squares in only one way, i.e., 7022942809 + 4244913409 = 83803^2 + 65153^2 .

It is not an unprimeable number, because it can be changed into a prime (11267856217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2816964053 + ... + 2816964056.

Almost surely, 2^11267856218 is an apocalyptic number.

11267856218 is a deficient number, since it is larger than the sum of its proper divisors (5633928112).

11267856218 is an equidigital number, since it uses as much as digits as its factorization.

11267856218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633928111.

The product of its digits is 322560, while the sum is 47.

The spelling of 11267856218 in words is "eleven billion, two hundred sixty-seven million, eight hundred fifty-six thousand, two hundred eighteen".