18669047 has 2 divisors, whose sum is σ = 18669048. Its totient is φ = 18669046.

The previous prime is 18669029. The next prime is 18669061. The reversal of 18669047 is 74096681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18669047 - 2⁸ = 18668791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18668995 and 18669013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18669017) 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, 9334523 + 9334524.

It is an arithmetic number, because the mean of its divisors is an integer number (9334524).

Almost surely, 2^18669047 is an apocalyptic number.

18669047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18669047 is an equidigital number, since it uses as much as digits as its factorization.

18669047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 18669047 is about 4320.7692602128. The cubic root of 18669047 is about 265.2817556216.

The spelling of 18669047 in words is "eighteen million, six hundred sixty-nine thousand, forty-seven".