18057679 has 4 divisors (see below), whose sum is σ = 18070560. Its totient is φ = 18044800.

The previous prime is 18057673. The next prime is 18057709. The reversal of 18057679 is 97675081.

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 18057679 - 2⁷ = 18057551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18057673) 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 3 ways as a sum of consecutive naturals, for example, 4039 + ... + 7240.

It is an arithmetic number, because the mean of its divisors is an integer number (4517640).

Almost surely, 2^18057679 is an apocalyptic number.

18057679 is a deficient number, since it is larger than the sum of its proper divisors (12881).

18057679 is a wasteful number, since it uses less digits than its factorization.

18057679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 18057679 is about 4249.4327856786. The cubic root of 18057679 is about 262.3537701049.

The spelling of 18057679 in words is "eighteen million, fifty-seven thousand, six hundred seventy-nine".