18969047 has 2 divisors, whose sum is σ = 18969048. Its totient is φ = 18969046.

The previous prime is 18969007. The next prime is 18969077. The reversal of 18969047 is 74096981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18969047 - 2⁸ = 18968791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18968989 and 18969007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18969007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484523 + 9484524.

It is an arithmetic number, because the mean of its divisors is an integer number (9484524).

Almost surely, 2^18969047 is an apocalyptic number.

18969047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969047 is an equidigital number, since it uses as much as digits as its factorization.

18969047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 18969047 is about 4355.3469437004. The cubic root of 18969047 is about 266.6951825408.

The spelling of 18969047 in words is "eighteen million, nine hundred sixty-nine thousand, forty-seven".