13521870120 has 128 divisors (see below), whose sum is σ = 44312365440. Its totient is φ = 3273661440.

The previous prime is 13521870083. The next prime is 13521870181. The reversal of 13521870120 is 2107812531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045614 + ... + 1058466.

It is an arithmetic number, because the mean of its divisors is an integer number (346190355).

Almost surely, 2^13521870120 is an apocalyptic number.

13521870120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13521870120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22156182720).

13521870120 is an abundant number, since it is smaller than the sum of its proper divisors (30790495320).

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

13521870120 is a wasteful number, since it uses less digits than its factorization.

13521870120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13675 (or 13671 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 13521870120 in words is "thirteen billion, five hundred twenty-one million, eight hundred seventy thousand, one hundred twenty".