18349047 has 6 divisors (see below), whose sum is σ = 26504192. Its totient is φ = 12232692.

The previous prime is 18349043. The next prime is 18349049. The reversal of 18349047 is 74094381.

It is a happy number.

It is not a de Polignac number, because 18349047 - 2² = 18349043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18349043) 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 in 5 ways as a sum of consecutive naturals, for example, 1019383 + ... + 1019400.

Almost surely, 2^18349047 is an apocalyptic number.

18349047 is a deficient number, since it is larger than the sum of its proper divisors (8155145).

18349047 is a wasteful number, since it uses less digits than its factorization.

18349047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038789 (or 2038786 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18349047 is about 4283.5787608027. The cubic root of 18349047 is about 263.7573096811.

The spelling of 18349047 in words is "eighteen million, three hundred forty-nine thousand, forty-seven".