18070305 has 16 divisors (see below), whose sum is σ = 31541184. Its totient is φ = 8761280.

The previous prime is 18070301. The next prime is 18070309. The reversal of 18070305 is 50307081.

It is an interprime number because it is at equal distance from previous prime (18070301) and next prime (18070309).

It is not a de Polignac number, because 18070305 - 2² = 18070301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18070301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54594 + ... + 54923.

It is an arithmetic number, because the mean of its divisors is an integer number (1971324).

Almost surely, 2^18070305 is an apocalyptic number.

18070305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18070305 is a deficient number, since it is larger than the sum of its proper divisors (13470879).

18070305 is a wasteful number, since it uses less digits than its factorization.

18070305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109536.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 18070305 is about 4250.9181361207. The cubic root of 18070305 is about 262.4149021210.

Adding to 18070305 its reverse (50307081), we get a palindrome (68377386).

The spelling of 18070305 in words is "eighteen million, seventy thousand, three hundred five".