2044003813 has 4 divisors (see below), whose sum is σ = 2132873568. Its totient is φ = 1955134060.

The previous prime is 2044003811. The next prime is 2044003837. The reversal of 2044003813 is 3183004402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2044003813 - 2¹ = 2044003811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044003811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44434843 + ... + 44434888.

It is an arithmetic number, because the mean of its divisors is an integer number (533218392).

Almost surely, 2^2044003813 is an apocalyptic number.

2044003813 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2044003813 is a deficient number, since it is larger than the sum of its proper divisors (88869755).

2044003813 is an equidigital number, since it uses as much as digits as its factorization.

2044003813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88869754.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 2044003813 is about 45210.6603911069. The cubic root of 2044003813 is about 1269.0943204931.

The spelling of 2044003813 in words is "two billion, forty-four million, three thousand, eight hundred thirteen".