12203819 has 4 divisors (see below), whose sum is σ = 12210840. Its totient is φ = 12196800.

The previous prime is 12203803. The next prime is 12203831. The reversal of 12203819 is 91830221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 91830221 = 7 ⋅13118603.

It is a cyclic number.

It is not a de Polignac number, because 12203819 - 2⁴ = 12203803 is a prime.

It is a super-2 number, since 2×12203819² = 297866396369522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12203839) 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, 1244 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (3052710).

Almost surely, 2^12203819 is an apocalyptic number.

12203819 is a deficient number, since it is larger than the sum of its proper divisors (7021).

12203819 is an equidigital number, since it uses as much as digits as its factorization.

12203819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12203819 is about 3493.3964847981. The cubic root of 12203819 is about 230.2317701483.

The spelling of 12203819 in words is "twelve million, two hundred three thousand, eight hundred nineteen".