18052207 has 4 divisors (see below), whose sum is σ = 18066040. Its totient is φ = 18038376.

The previous prime is 18052187. The next prime is 18052213. The reversal of 18052207 is 70225081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18052207 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 (18052267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728 + ... + 7645.

It is an arithmetic number, because the mean of its divisors is an integer number (4516510).

Almost surely, 2^18052207 is an apocalyptic number.

18052207 is a deficient number, since it is larger than the sum of its proper divisors (13833).

18052207 is a wasteful number, since it uses less digits than its factorization.

18052207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13832.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18052207 is about 4248.7888862592. The cubic root of 18052207 is about 262.3272671628.

Adding to 18052207 its reverse (70225081), we get a palindrome (88277288).

The spelling of 18052207 in words is "eighteen million, fifty-two thousand, two hundred seven".