18226620019 has 2 divisors, whose sum is σ = 18226620020. Its totient is φ = 18226620018.

The previous prime is 18226620007. The next prime is 18226620037. The reversal of 18226620019 is 91002662281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18226620019 - 2¹⁹ = 18226095731 is a prime.

It is a super-2 number, since 2×18226620019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18226620019.

It is not a weakly prime, because it can be changed into another prime (18226620059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113310009 + 9113310010.

It is an arithmetic number, because the mean of its divisors is an integer number (9113310010).

Almost surely, 2^18226620019 is an apocalyptic number.

18226620019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18226620019 is an equidigital number, since it uses as much as digits as its factorization.

18226620019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 18226620019 in words is "eighteen billion, two hundred twenty-six million, six hundred twenty thousand, nineteen".