18000007 has 8 divisors (see below), whose sum is σ = 18832896. Its totient is φ = 17171352.

The previous prime is 17999987. The next prime is 18000041. The reversal of 18000007 is 70000081.

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

It is a cyclic number.

It is not a de Polignac number, because 18000007 - 2⁷ = 17999879 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000067) 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, 10398 + ... + 12004.

It is an arithmetic number, because the mean of its divisors is an integer number (2354112).

Almost surely, 2^18000007 is an apocalyptic number.

18000007 is a deficient number, since it is larger than the sum of its proper divisors (832889).

18000007 is a wasteful number, since it uses less digits than its factorization.

18000007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 18000007 is about 4242.6415120771. The cubic root of 18000007 is about 262.0741733935.

Adding to 18000007 its reverse (70000081), we get a palindrome (88000088).

It can be divided in two parts, 1 and 8000007, that added together give a palindrome (8000008).

The spelling of 18000007 in words is "eighteen million, seven", and thus it is an aban number and an uban number.