18505007 has 8 divisors (see below), whose sum is σ = 19006416. Its totient is φ = 18006912.

The previous prime is 18504991. The next prime is 18505013. The reversal of 18505007 is 70050581.

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 18505007 - 2⁴ = 18504991 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 (18505037) 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, 13853 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (2375802).

Almost surely, 2^18505007 is an apocalyptic number.

18505007 is a deficient number, since it is larger than the sum of its proper divisors (501409).

18505007 is a wasteful number, since it uses less digits than its factorization.

18505007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 18505007 is about 4301.7446460709. The cubic root of 18505007 is about 264.5024817431.

Adding to 18505007 its reverse (70050581), we get a palindrome (88555588).

The spelling of 18505007 in words is "eighteen million, five hundred five thousand, seven".