18418906211 has 2 divisors, whose sum is σ = 18418906212. Its totient is φ = 18418906210.

The previous prime is 18418906201. The next prime is 18418906243. The reversal of 18418906211 is 11260981481.

It is a weak prime.

It is an emirp because it is prime and its reverse (11260981481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18418906211 - 2³⁰ = 17345164387 is a prime.

It is a super-2 number, since 2×18418906211² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18418906201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209453105 + 9209453106.

It is an arithmetic number, because the mean of its divisors is an integer number (9209453106).

Almost surely, 2^18418906211 is an apocalyptic number.

18418906211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18418906211 is an equidigital number, since it uses as much as digits as its factorization.

18418906211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 41.

The spelling of 18418906211 in words is "eighteen billion, four hundred eighteen million, nine hundred six thousand, two hundred eleven".