12193881 has 16 divisors (see below), whose sum is σ = 19181568. Its totient is φ = 6742800.

The previous prime is 12193871. The next prime is 12193889. The reversal of 12193881 is 18839121.

It is not a de Polignac number, because 12193881 - 2¹⁰ = 12192857 is a prime.

It is a super-2 number, since 2×12193881² = 297381467684322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12193889) 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, 8715 + ... + 10016.

It is an arithmetic number, because the mean of its divisors is an integer number (1198848).

Almost surely, 2^12193881 is an apocalyptic number.

It is an amenable number.

12193881 is a deficient number, since it is larger than the sum of its proper divisors (6987687).

12193881 is a wasteful number, since it uses less digits than its factorization.

12193881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772.

The product of its digits is 3456, while the sum is 33.

The square root of 12193881 is about 3491.9737971526. The cubic root of 12193881 is about 230.1692578946.

The spelling of 12193881 in words is "twelve million, one hundred ninety-three thousand, eight hundred eighty-one".