18147019 has 8 divisors (see below), whose sum is σ = 19828800. Its totient is φ = 16470600.

The previous prime is 18147001. The next prime is 18147053. The reversal of 18147019 is 91074181.

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 18147019 - 2⁹ = 18146507 is a prime.

It is a super-2 number, since 2×18147019² = 658628597172722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18147089) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 9832 + ... + 11530.

It is an arithmetic number, because the mean of its divisors is an integer number (2478600).

Almost surely, 2^18147019 is an apocalyptic number.

18147019 is a deficient number, since it is larger than the sum of its proper divisors (1681781).

18147019 is a wasteful number, since it uses less digits than its factorization.

18147019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 18147019 is about 4259.9318069659. The cubic root of 18147019 is about 262.7857218446.

The spelling of 18147019 in words is "eighteen million, one hundred forty-seven thousand, nineteen".