1838222237209 has 4 divisors (see below), whose sum is σ = 1838228031504. Its totient is φ = 1838216442916.

The previous prime is 1838222237197. The next prime is 1838222237227. The reversal of 1838222237209 is 9027322228381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1838222237209 - 2¹³ = 1838222229017 is a prime.

It is a super-2 number, since 2×1838222237209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1838222237809) 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, 2391907 + ... + 3065560.

It is an arithmetic number, because the mean of its divisors is an integer number (459557007876).

Almost surely, 2^{1838222237209} is an apocalyptic number.

It is an amenable number.

1838222237209 is a deficient number, since it is larger than the sum of its proper divisors (5794295).

1838222237209 is an equidigital number, since it uses as much as digits as its factorization.

1838222237209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794294.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 1838222237209 in words is "one trillion, eight hundred thirty-eight billion, two hundred twenty-two million, two hundred thirty-seven thousand, two hundred nine".