12189814 has 16 divisors (see below), whose sum is σ = 22504608. Its totient is φ = 4822272.

The previous prime is 12189809. The next prime is 12189817. The reversal of 12189814 is 41898121.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12189814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33307 + ... + 33670.

It is an arithmetic number, because the mean of its divisors is an integer number (1406538).

Almost surely, 2^12189814 is an apocalyptic number.

12189814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12189814 is a deficient number, since it is larger than the sum of its proper divisors (10314794).

12189814 is a wasteful number, since it uses less digits than its factorization.

12189814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66999.

The product of its digits is 4608, while the sum is 34.

The square root of 12189814 is about 3491.3914131761. The cubic root of 12189814 is about 230.1436657564.

The spelling of 12189814 in words is "twelve million, one hundred eighty-nine thousand, eight hundred fourteen".