13021346544 has 20 divisors (see below), whose sum is σ = 33638478696. Its totient is φ = 4340448832.

The previous prime is 13021346543. The next prime is 13021346561. The reversal of 13021346544 is 44564312031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021346543) 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, 135638979 + ... + 135639074.

Almost surely, 2^13021346544 is an apocalyptic number.

It is an amenable number.

13021346544 is an abundant number, since it is smaller than the sum of its proper divisors (20617132152).

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

13021346544 is a wasteful number, since it uses less digits than its factorization.

13021346544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271278064 (or 271278058 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 13021346544 its reverse (44564312031), we get a palindrome (57585658575).

The spelling of 13021346544 in words is "thirteen billion, twenty-one million, three hundred forty-six thousand, five hundred forty-four".