18070918 has 4 divisors (see below), whose sum is σ = 27106380. Its totient is φ = 9035458.

The previous prime is 18070891. The next prime is 18070963. The reversal of 18070918 is 81907081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4517728 + ... + 4517731.

It is an arithmetic number, because the mean of its divisors is an integer number (6776595).

Almost surely, 2^18070918 is an apocalyptic number.

18070918 is a deficient number, since it is larger than the sum of its proper divisors (9035462).

18070918 is an equidigital number, since it uses as much as digits as its factorization.

18070918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9035461.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 18070918 is about 4250.9902375799. The cubic root of 18070918 is about 262.4178693927.

Adding to 18070918 its reverse (81907081), we get a palindrome (99977999).

The spelling of 18070918 in words is "eighteen million, seventy thousand, nine hundred eighteen".