18307147 has 8 divisors (see below), whose sum is σ = 19674576. Its totient is φ = 16972032.

The previous prime is 18307141. The next prime is 18307151. The reversal of 18307147 is 74170381.

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 18307147 - 2¹⁹ = 17782859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18307141) 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, 6898 + ... + 9175.

It is an arithmetic number, because the mean of its divisors is an integer number (2459322).

Almost surely, 2^18307147 is an apocalyptic number.

18307147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18307147 is a deficient number, since it is larger than the sum of its proper divisors (1367429).

18307147 is a wasteful number, since it uses less digits than its factorization.

18307147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16157.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 18307147 is about 4278.6851952440. The cubic root of 18307147 is about 263.5563936348.

The spelling of 18307147 in words is "eighteen million, three hundred seven thousand, one hundred forty-seven".