18579823 has 2 divisors, whose sum is σ = 18579824. Its totient is φ = 18579822.

The previous prime is 18579811. The next prime is 18579829. The reversal of 18579823 is 32897581.

It is a strong prime.

It is an emirp because it is prime and its reverse (32897581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18579823 is a prime.

It is a super-2 number, since 2×18579823² = 690419645422658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18579823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18579829) 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 as a sum of consecutive naturals, namely, 9289911 + 9289912.

It is an arithmetic number, because the mean of its divisors is an integer number (9289912).

Almost surely, 2^18579823 is an apocalyptic number.

18579823 is a deficient number, since it is larger than the sum of its proper divisors (1).

18579823 is an equidigital number, since it uses as much as digits as its factorization.

18579823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 18579823 is about 4310.4318809140. The cubic root of 18579823 is about 264.8584648261.

It can be divided in two parts, 185 and 79823, that added together give a palindrome (80008).

The spelling of 18579823 in words is "eighteen million, five hundred seventy-nine thousand, eight hundred twenty-three".