13821071420 has 48 divisors (see below), whose sum is σ = 31295076960. Its totient is φ = 5096929536.

The previous prime is 13821071413. The next prime is 13821071441. The reversal of 13821071420 is 2417012831.

It is a congruent number.

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, 183479 + ... + 247601.

It is an arithmetic number, because the mean of its divisors is an integer number (651980770).

Almost surely, 2^13821071420 is an apocalyptic number.

13821071420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13821071420 is an abundant number, since it is smaller than the sum of its proper divisors (17474005540).

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

13821071420 is a wasteful number, since it uses less digits than its factorization.

13821071420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64974 (or 64972 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 13821071420 in words is "thirteen billion, eight hundred twenty-one million, seventy-one thousand, four hundred twenty".