18049207 has 12 divisors (see below), whose sum is σ = 20306440. Its totient is φ = 16022160.

The previous prime is 18049169. The next prime is 18049231. The reversal of 18049207 is 70294081.

It is not a de Polignac number, because 18049207 - 2⁷ = 18049079 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049237) 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 in 11 ways as a sum of consecutive naturals, for example, 3469 + ... + 6937.

Almost surely, 2^18049207 is an apocalyptic number.

18049207 is the 3469-th pentagonal number.

18049207 is a deficient number, since it is larger than the sum of its proper divisors (2257233).

18049207 is a wasteful number, since it uses less digits than its factorization.

18049207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534 (or 3523 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18049207 is about 4248.4358298084. The cubic root of 18049207 is about 262.3127347679.

It can be divided in two parts, 1804 and 9207, that added together give a palindrome (11011).

The spelling of 18049207 in words is "eighteen million, forty-nine thousand, two hundred seven".