18227846911 has 4 divisors (see below), whose sum is σ = 18231777432. Its totient is φ = 18223916392.

The previous prime is 18227846873. The next prime is 18227846927. The reversal of 18227846911 is 11964872281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18227846911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227846971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958296 + ... + 1967581.

It is an arithmetic number, because the mean of its divisors is an integer number (4557944358).

Almost surely, 2^18227846911 is an apocalyptic number.

18227846911 is a deficient number, since it is larger than the sum of its proper divisors (3930521).

18227846911 is an equidigital number, since it uses as much as digits as its factorization.

18227846911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930520.

The product of its digits is 387072, while the sum is 49.

The spelling of 18227846911 in words is "eighteen billion, two hundred twenty-seven million, eight hundred forty-six thousand, nine hundred eleven".