13155530020 has 24 divisors (see below), whose sum is σ = 28005062904. Its totient is φ = 5190126336.

The previous prime is 13155529993. The next prime is 13155530051. The reversal of 13155530020 is 2003555131.

It can be written as a sum of positive squares in 4 ways, for example, as 357604 + 13155172416 = 598^2 + 114696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503859 + ... + 4506778.

It is an arithmetic number, because the mean of its divisors is an integer number (1166877621).

Almost surely, 2^13155530020 is an apocalyptic number.

13155530020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13155530020 is an abundant number, since it is smaller than the sum of its proper divisors (14849532884).

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

13155530020 is a wasteful number, since it uses less digits than its factorization.

13155530020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010719 (or 9010717 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 13155530020 in words is "thirteen billion, one hundred fifty-five million, five hundred thirty thousand, twenty".