13572312820 has 48 divisors (see below), whose sum is σ = 31851320256. Its totient is φ = 4815008000.

The previous prime is 13572312799. The next prime is 13572312821. The reversal of 13572312820 is 2821327531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13572312821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743326 + ... + 761365.

It is an arithmetic number, because the mean of its divisors is an integer number (663569172).

Almost surely, 2^13572312820 is an apocalyptic number.

13572312820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13572312820 is an abundant number, since it is smaller than the sum of its proper divisors (18279007436).

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

13572312820 is a wasteful number, since it uses less digits than its factorization.

13572312820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504752 (or 1504750 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 13572312820 in words is "thirteen billion, five hundred seventy-two million, three hundred twelve thousand, eight hundred twenty".