18147907 has 4 divisors (see below), whose sum is σ = 19103080. Its totient is φ = 17192736.

The previous prime is 18147893. The next prime is 18147917. The reversal of 18147907 is 70974181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18147907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18147917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477558 + ... + 477595.

It is an arithmetic number, because the mean of its divisors is an integer number (4775770).

Almost surely, 2^18147907 is an apocalyptic number.

18147907 is a deficient number, since it is larger than the sum of its proper divisors (955173).

18147907 is an equidigital number, since it uses as much as digits as its factorization.

18147907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955172.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 18147907 is about 4260.0360327115. The cubic root of 18147907 is about 262.7900081301.

The spelling of 18147907 in words is "eighteen million, one hundred forty-seven thousand, nine hundred seven".