13218421020 has 192 divisors, whose sum is σ = 43476550656. Its totient is φ = 2937876480.

The previous prime is 13218421019. The next prime is 13218421061. The reversal of 13218421020 is 2012481231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4350942 + ... + 4353978.

It is an arithmetic number, because the mean of its divisors is an integer number (226440368).

Almost surely, 2^13218421020 is an apocalyptic number.

13218421020 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 13218421020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21738275328).

13218421020 is an abundant number, since it is smaller than the sum of its proper divisors (30258129636).

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

13218421020 is a wasteful number, since it uses less digits than its factorization.

13218421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3338 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 13218421020 in words is "thirteen billion, two hundred eighteen million, four hundred twenty-one thousand, twenty".