18472307 has 4 divisors (see below), whose sum is σ = 21111216. Its totient is φ = 15833400.

The previous prime is 18472291. The next prime is 18472367. The reversal of 18472307 is 70327481.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18472307 - 2⁴ = 18472291 is a prime.

It is a super-2 number, since 2×18472307² = 682452251804498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18472367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319444 + ... + 1319457.

It is an arithmetic number, because the mean of its divisors is an integer number (5277804).

Almost surely, 2^18472307 is an apocalyptic number.

18472307 is a deficient number, since it is larger than the sum of its proper divisors (2638909).

18472307 is an equidigital number, since it uses as much as digits as its factorization.

18472307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638908.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 18472307 is about 4297.9421820215. The cubic root of 18472307 is about 264.3465900465.

Adding to 18472307 its reverse (70327481), we get a palindrome (88799788).

The spelling of 18472307 in words is "eighteen million, four hundred seventy-two thousand, three hundred seven".