44820013 has 4 divisors (see below), whose sum is σ = 51222880. Its totient is φ = 38417148.

The previous prime is 44820001. The next prime is 44820019. The reversal of 44820013 is 31002844.

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 de Polignac number, because none of the positive numbers 2^k-44820013 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 (44820019) 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, 3201423 + ... + 3201436.

It is an arithmetic number, because the mean of its divisors is an integer number (12805720).

Almost surely, 2^44820013 is an apocalyptic number.

It is an amenable number.

44820013 is a deficient number, since it is larger than the sum of its proper divisors (6402867).

44820013 is an equidigital number, since it uses as much as digits as its factorization.

44820013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402866.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 44820013 is about 6694.7750522329. The cubic root of 44820013 is about 355.2144786061.

Adding to 44820013 its reverse (31002844), we get a palindrome (75822857).

The spelling of 44820013 in words is "forty-four million, eight hundred twenty thousand, thirteen".