18230071 has 4 divisors (see below), whose sum is σ = 18479872. Its totient is φ = 17980272.

The previous prime is 18230057. The next prime is 18230081. The reversal of 18230071 is 17003281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17003281 = 17 ⋅1000193.

It is a cyclic number.

It is not a de Polignac number, because 18230071 - 2⁷ = 18229943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18230041) 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, 124791 + ... + 124936.

It is an arithmetic number, because the mean of its divisors is an integer number (4619968).

Almost surely, 2^18230071 is an apocalyptic number.

18230071 is a deficient number, since it is larger than the sum of its proper divisors (249801).

18230071 is an equidigital number, since it uses as much as digits as its factorization.

18230071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249800.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18230071 is about 4269.6687225123. The cubic root of 18230071 is about 263.1860019024.

The spelling of 18230071 in words is "eighteen million, two hundred thirty thousand, seventy-one".