18836047 has 2 divisors, whose sum is σ = 18836048. Its totient is φ = 18836046.

The previous prime is 18836039. The next prime is 18836053. The reversal of 18836047 is 74063881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18836047 - 2³ = 18836039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18835997 and 18836015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18836647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9418023 + 9418024.

It is an arithmetic number, because the mean of its divisors is an integer number (9418024).

Almost surely, 2^18836047 is an apocalyptic number.

18836047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18836047 is an equidigital number, since it uses as much as digits as its factorization.

18836047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 18836047 is about 4340.0514973903. The cubic root of 18836047 is about 266.0704159028.

The spelling of 18836047 in words is "eighteen million, eight hundred thirty-six thousand, forty-seven".