13561510020 has 48 divisors (see below), whose sum is σ = 37988563200. Its totient is φ = 3614846976.

The previous prime is 13561509971. The next prime is 13561510031. The reversal of 13561510020 is 2001516531.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95556 + ... + 190404.

It is an arithmetic number, because the mean of its divisors is an integer number (791428400).

Almost surely, 2^13561510020 is an apocalyptic number.

13561510020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13561510020 is an abundant number, since it is smaller than the sum of its proper divisors (24427053180).

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

13561510020 is a wasteful number, since it uses less digits than its factorization.

13561510020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97244 (or 97242 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 13561510020 in words is "thirteen billion, five hundred sixty-one million, five hundred ten thousand, twenty".