18665033407 has 2 divisors, whose sum is σ = 18665033408. Its totient is φ = 18665033406.

The previous prime is 18665033371. The next prime is 18665033423. The reversal of 18665033407 is 70433056681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18665033407 - 2⁷ = 18665033279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18665033207) 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, 9332516703 + 9332516704.

It is an arithmetic number, because the mean of its divisors is an integer number (9332516704).

Almost surely, 2^18665033407 is an apocalyptic number.

18665033407 is a deficient number, since it is larger than the sum of its proper divisors (1).

18665033407 is an equidigital number, since it uses as much as digits as its factorization.

18665033407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 18665033407 in words is "eighteen billion, six hundred sixty-five million, thirty-three thousand, four hundred seven".