12081993 has 32 divisors (see below), whose sum is σ = 20262912. Its totient is φ = 6220800.

The previous prime is 12081991. The next prime is 12081997. The reversal of 12081993 is 39918021.

12081993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12081993 - 2¹ = 12081991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12081991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44448 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (633216).

Almost surely, 2^12081993 is an apocalyptic number.

It is an amenable number.

12081993 is a deficient number, since it is larger than the sum of its proper divisors (8180919).

12081993 is a wasteful number, since it uses less digits than its factorization.

12081993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12081993 is about 3475.9161382289. The cubic root of 12081993 is about 229.4631017995.

The spelling of 12081993 in words is "twelve million, eighty-one thousand, nine hundred ninety-three".