18226842861 has 16 divisors (see below), whose sum is σ = 25605026240. Its totient is φ = 11501118720.

The previous prime is 18226842841. The next prime is 18226842889. The reversal of 18226842861 is 16824862281.

It is not a de Polignac number, because 18226842861 - 2¹³ = 18226834669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18226842861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226842811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83980 + ... + 208581.

It is an arithmetic number, because the mean of its divisors is an integer number (1600314140).

Almost surely, 2^18226842861 is an apocalyptic number.

It is an amenable number.

18226842861 is a deficient number, since it is larger than the sum of its proper divisors (7378183379).

18226842861 is a wasteful number, since it uses less digits than its factorization.

18226842861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293676.

The product of its digits is 589824, while the sum is 48.

The spelling of 18226842861 in words is "eighteen billion, two hundred twenty-six million, eight hundred forty-two thousand, eight hundred sixty-one".