18200019811 has 2 divisors, whose sum is σ = 18200019812. Its totient is φ = 18200019810.

The previous prime is 18200019787. The next prime is 18200019821. The reversal of 18200019811 is 11891000281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18200019811 - 2¹¹ = 18200017763 is a prime.

It is a super-2 number, since 2×18200019811² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18200019821) 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, 9100009905 + 9100009906.

It is an arithmetic number, because the mean of its divisors is an integer number (9100009906).

Almost surely, 2^18200019811 is an apocalyptic number.

18200019811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18200019811 is an equidigital number, since it uses as much as digits as its factorization.

18200019811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 18200019811 in words is "eighteen billion, two hundred million, nineteen thousand, eight hundred eleven".