13821925428 has 48 divisors (see below), whose sum is σ = 35890532160. Its totient is φ = 4600120032.

The previous prime is 13821925373. The next prime is 13821925441. The reversal of 13821925428 is 82452912831.

13821925428 is a `hidden beast` number, since 1 + 3 + 8 + 219 + 2 + 5 + 428 = 666.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 30075 + ... + 168962.

It is an arithmetic number, because the mean of its divisors is an integer number (747719420).

Almost surely, 2^13821925428 is an apocalyptic number.

13821925428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13821925428 is an abundant number, since it is smaller than the sum of its proper divisors (22068606732).

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

13821925428 is a wasteful number, since it uses less digits than its factorization.

13821925428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199693 (or 199685 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 13821925428 in words is "thirteen billion, eight hundred twenty-one million, nine hundred twenty-five thousand, four hundred twenty-eight".