18066869047 has 2 divisors, whose sum is σ = 18066869048. Its totient is φ = 18066869046.

The previous prime is 18066869039. The next prime is 18066869053. The reversal of 18066869047 is 74096866081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18066869047 - 2³ = 18066869039 is a prime.

It is a super-2 number, since 2×18066869047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18066869057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033434523 + 9033434524.

It is an arithmetic number, because the mean of its divisors is an integer number (9033434524).

Almost surely, 2^18066869047 is an apocalyptic number.

18066869047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066869047 is an equidigital number, since it uses as much as digits as its factorization.

18066869047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 18066869047 in words is "eighteen billion, sixty-six million, eight hundred sixty-nine thousand, forty-seven".