13857144920 has 16 divisors (see below), whose sum is σ = 31178576160. Its totient is φ = 5542857952.

The previous prime is 13857144911. The next prime is 13857144967. The reversal of 13857144920 is 2944175831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173214272 + ... + 173214351.

It is an arithmetic number, because the mean of its divisors is an integer number (1948661010).

Almost surely, 2^13857144920 is an apocalyptic number.

13857144920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13857144920 is an abundant number, since it is smaller than the sum of its proper divisors (17321431240).

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

13857144920 is a wasteful number, since it uses less digits than its factorization.

13857144920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346428634 (or 346428630 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 13857144920 in words is "thirteen billion, eight hundred fifty-seven million, one hundred forty-four thousand, nine hundred twenty".