20444015413 has 4 divisors (see below), whose sum is σ = 20549943148. Its totient is φ = 20338087680.

The previous prime is 20444015357. The next prime is 20444015441. The reversal of 20444015413 is 31451044402.

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 13192130449 + 7251884964 = 114857^2 + 85158^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444015413 - 2²⁹ = 19907144501 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 (20444015213) 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, 52963578 + ... + 52963963.

It is an arithmetic number, because the mean of its divisors is an integer number (5137485787).

Almost surely, 2^20444015413 is an apocalyptic number.

It is an amenable number.

20444015413 is a deficient number, since it is larger than the sum of its proper divisors (105927735).

20444015413 is a wasteful number, since it uses less digits than its factorization.

20444015413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105927734.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 20444015413 its reverse (31451044402), we get a palindrome (51895059815).

The spelling of 20444015413 in words is "twenty billion, four hundred forty-four million, fifteen thousand, four hundred thirteen".