13213504542 has 96 divisors (see below), whose sum is σ = 31823400960. Its totient is φ = 3643133760.

The previous prime is 13213504481. The next prime is 13213504543. The reversal of 13213504542 is 24540531231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213504543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3543483 + ... + 3547209.

It is an arithmetic number, because the mean of its divisors is an integer number (331493760).

Almost surely, 2^13213504542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13213504542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15911700480).

13213504542 is an abundant number, since it is smaller than the sum of its proper divisors (18609896418).

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

13213504542 is a wasteful number, since it uses less digits than its factorization.

13213504542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166 (or 4159 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 13213504542 in words is "thirteen billion, two hundred thirteen million, five hundred four thousand, five hundred forty-two".