13020336444 has 12 divisors (see below), whose sum is σ = 30380785064. Its totient is φ = 4340112144.

The previous prime is 13020336437. The next prime is 13020336463. The reversal of 13020336444 is 44463302031.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×13020336444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542514007 + ... + 542514030.

Almost surely, 2^13020336444 is an apocalyptic number.

It is an amenable number.

13020336444 is an abundant number, since it is smaller than the sum of its proper divisors (17360448620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13020336444 is a wasteful number, since it uses less digits than its factorization.

13020336444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085028044 (or 1085028042 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 13020336444 its reverse (44463302031), we get a palindrome (57483638475).

The spelling of 13020336444 in words is "thirteen billion, twenty million, three hundred thirty-six thousand, four hundred forty-four".