12018803 has 4 divisors (see below), whose sum is σ = 12026448. Its totient is φ = 12011160.

The previous prime is 12018749. The next prime is 12018817. The reversal of 12018803 is 30881021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12018803 - 2⁶ = 12018739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12018833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (3006612).

Almost surely, 2^12018803 is an apocalyptic number.

12018803 is a deficient number, since it is larger than the sum of its proper divisors (7645).

12018803 is an equidigital number, since it uses as much as digits as its factorization.

12018803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7644.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 12018803 is about 3466.8145321029. The cubic root of 12018803 is about 229.0623642303.

Adding to 12018803 its reverse (30881021), we get a palindrome (42899824).

It can be divided in two parts, 12018 and 803, that added together give a palindrome (12821).

The spelling of 12018803 in words is "twelve million, eighteen thousand, eight hundred three".