18047207 has 4 divisors (see below), whose sum is σ = 18997080. Its totient is φ = 17097336.

The previous prime is 18047191. The next prime is 18047209. The reversal of 18047207 is 70274081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70274081 = 599 ⋅117319.

It is a cyclic number.

It is not a de Polignac number, because 18047207 - 2⁴ = 18047191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18047207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047209) 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, 474908 + ... + 474945.

It is an arithmetic number, because the mean of its divisors is an integer number (4749270).

Almost surely, 2^18047207 is an apocalyptic number.

18047207 is a deficient number, since it is larger than the sum of its proper divisors (949873).

18047207 is an equidigital number, since it uses as much as digits as its factorization.

18047207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949872.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 18047207 is about 4248.2004425403. The cubic root of 18047207 is about 262.3030456101.

The spelling of 18047207 in words is "eighteen million, forty-seven thousand, two hundred seven".