13218849 has 16 divisors (see below), whose sum is σ = 22381440. Its totient is φ = 7553520.

The previous prime is 13218847. The next prime is 13218871. The reversal of 13218849 is 94881231.

It is not a de Polignac number, because 13218849 - 2¹ = 13218847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13218847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34782 + ... + 35159.

It is an arithmetic number, because the mean of its divisors is an integer number (1398840).

Almost surely, 2^13218849 is an apocalyptic number.

It is an amenable number.

13218849 is a deficient number, since it is larger than the sum of its proper divisors (9162591).

13218849 is an equidigital number, since it uses as much as digits as its factorization.

13218849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69957 (or 69951 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 13218849 is about 3635.7735077972. The cubic root of 13218849 is about 236.4455875906.

It can be divided in two parts, 132 and 18849, that added together give a palindrome (18981).

The spelling of 13218849 in words is "thirteen million, two hundred eighteen thousand, eight hundred forty-nine".