13218023 has 8 divisors (see below), whose sum is σ = 16268448. Its totient is φ = 10458144.

The previous prime is 13218019. The next prime is 13218047. The reversal of 13218023 is 32081231.

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

It is a cyclic number.

It is not a de Polignac number, because 13218023 - 2² = 13218019 is a prime.

It is a super-2 number, since 2×13218023² = 349432264057058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13217986 and 13218004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218083) 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 7 ways as a sum of consecutive naturals, for example, 72536 + ... + 72717.

It is an arithmetic number, because the mean of its divisors is an integer number (2033556).

Almost surely, 2^13218023 is an apocalyptic number.

13218023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13218023 is a deficient number, since it is larger than the sum of its proper divisors (3050425).

13218023 is a wasteful number, since it uses less digits than its factorization.

13218023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145273.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 13218023 is about 3635.6599125881. The cubic root of 13218023 is about 236.4406625999.

Adding to 13218023 its reverse (32081231), we get a palindrome (45299254).

The spelling of 13218023 in words is "thirteen million, two hundred eighteen thousand, twenty-three".