18242207 has 8 divisors (see below), whose sum is σ = 19352592. Its totient is φ = 17136000.

The previous prime is 18242183. The next prime is 18242209. The reversal of 18242207 is 70224281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18242207 - 2¹² = 18238111 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 (18242209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16832 + ... + 17882.

It is an arithmetic number, because the mean of its divisors is an integer number (2419074).

Almost surely, 2^18242207 is an apocalyptic number.

18242207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18242207 is a deficient number, since it is larger than the sum of its proper divisors (1110385).

18242207 is a wasteful number, since it uses less digits than its factorization.

18242207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 18242207 is about 4271.0896736079. The cubic root of 18242207 is about 263.2443910846.

Adding to 18242207 its reverse (70224281), we get a palindrome (88466488).

The spelling of 18242207 in words is "eighteen million, two hundred forty-two thousand, two hundred seven".