13947843220 has 12 divisors (see below), whose sum is σ = 29290470804. Its totient is φ = 5579137280.

The previous prime is 13947843211. The next prime is 13947843227. The reversal of 13947843220 is 2234874931.

It can be written as a sum of positive squares in 2 ways, for example, as 5540420356 + 8407422864 = 74434^2 + 91692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13947843227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 348696061 + ... + 348696100.

It is an arithmetic number, because the mean of its divisors is an integer number (2440872567).

Almost surely, 2^13947843220 is an apocalyptic number.

13947843220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13947843220 is an abundant number, since it is smaller than the sum of its proper divisors (15342627584).

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

13947843220 is a wasteful number, since it uses less digits than its factorization.

13947843220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697392170 (or 697392168 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 13947843220 in words is "thirteen billion, nine hundred forty-seven million, eight hundred forty-three thousand, two hundred twenty".