18266838011 has 8 divisors (see below), whose sum is σ = 19350161280. Its totient is φ = 17184492928.

The previous prime is 18266837999. The next prime is 18266838047. The reversal of 18266838011 is 11083866281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18266838011 - 2³⁰ = 17193096187 is a prime.

It is a super-2 number, since 2×18266838011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18266808011) 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, 205916 + ... + 280953.

It is an arithmetic number, because the mean of its divisors is an integer number (2418770160).

Almost surely, 2^18266838011 is an apocalyptic number.

18266838011 is a deficient number, since it is larger than the sum of its proper divisors (1083323269).

18266838011 is a wasteful number, since it uses less digits than its factorization.

18266838011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489093.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 18266838011 in words is "eighteen billion, two hundred sixty-six million, eight hundred thirty-eight thousand, eleven".