12420001849 has 4 divisors (see below), whose sum is σ = 12437720100. Its totient is φ = 12402283600.

The previous prime is 12420001777. The next prime is 12420001901. The reversal of 12420001849 is 94810002421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6194791849 + 6225210000 = 78707^2 + 78900^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420001849 - 2⁷ = 12420001721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12420001849.

It is not an unprimeable number, because it can be changed into a prime (12420001249) 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, 8858074 + ... + 8859475.

It is an arithmetic number, because the mean of its divisors is an integer number (3109430025).

Almost surely, 2^12420001849 is an apocalyptic number.

It is an amenable number.

12420001849 is a deficient number, since it is larger than the sum of its proper divisors (17718251).

12420001849 is an equidigital number, since it uses as much as digits as its factorization.

12420001849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17718250.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 12420001849 in words is "twelve billion, four hundred twenty million, one thousand, eight hundred forty-nine".