23081218 has 4 divisors (see below), whose sum is σ = 34621830. Its totient is φ = 11540608.

The previous prime is 23081209. The next prime is 23081249. The reversal of 23081218 is 81218032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 3659569 = 4407^2 + 1913^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23081192 and 23081201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770303 + ... + 5770306.

Almost surely, 2^23081218 is an apocalyptic number.

23081218 is a deficient number, since it is larger than the sum of its proper divisors (11540612).

23081218 is a wasteful number, since it uses less digits than its factorization.

23081218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540611.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 23081218 is about 4804.2916231220. The cubic root of 23081218 is about 284.7210484899.

The spelling of 23081218 in words is "twenty-three million, eighty-one thousand, two hundred eighteen".