18070015 has 4 divisors (see below), whose sum is σ = 21684024. Its totient is φ = 14456008.

The previous prime is 18070001. The next prime is 18070027. The reversal of 18070015 is 51007081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51007081 = 3947 ⋅12923.

It is a cyclic number.

It is not a de Polignac number, because 18070015 - 2⁵ = 18069983 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806997 + ... + 1807006.

It is an arithmetic number, because the mean of its divisors is an integer number (5421006).

Almost surely, 2^18070015 is an apocalyptic number.

18070015 is a deficient number, since it is larger than the sum of its proper divisors (3614009).

18070015 is an equidigital number, since it uses as much as digits as its factorization.

18070015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614008.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 18070015 is about 4250.8840257057. The cubic root of 18070015 is about 262.4134983312.

Adding to 18070015 its reverse (51007081), we get a palindrome (69077096).

The spelling of 18070015 in words is "eighteen million, seventy thousand, fifteen".