20044123213 has 4 divisors (see below), whose sum is σ = 20049965308. Its totient is φ = 20038281120.

The previous prime is 20044123199. The next prime is 20044123219. The reversal of 20044123213 is 31232144002.

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 8688663369 + 11355459844 = 93213^2 + 106562^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044123213 - 2⁵ = 20044123181 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 (20044123219) 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, 2915898 + ... + 2922763.

It is an arithmetic number, because the mean of its divisors is an integer number (5012491327).

Almost surely, 2^20044123213 is an apocalyptic number.

It is an amenable number.

20044123213 is a deficient number, since it is larger than the sum of its proper divisors (5842095).

20044123213 is an equidigital number, since it uses as much as digits as its factorization.

20044123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842094.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20044123213 its reverse (31232144002), we get a palindrome (51276267215).

The spelling of 20044123213 in words is "twenty billion, forty-four million, one hundred twenty-three thousand, two hundred thirteen".