18057147 has 8 divisors (see below), whose sum is σ = 24727056. Its totient is φ = 11712672.

The previous prime is 18057107. The next prime is 18057173. The reversal of 18057147 is 74175081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18057147 - 2⁷ = 18057019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18057107) 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, 81228 + ... + 81449.

It is an arithmetic number, because the mean of its divisors is an integer number (3090882).

Almost surely, 2^18057147 is an apocalyptic number.

18057147 is a deficient number, since it is larger than the sum of its proper divisors (6669909).

18057147 is a wasteful number, since it uses less digits than its factorization.

18057147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162717.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 18057147 is about 4249.3701886280. The cubic root of 18057147 is about 262.3511936649.

The spelling of 18057147 in words is "eighteen million, fifty-seven thousand, one hundred forty-seven".