13889474356 has 24 divisors (see below), whose sum is σ = 24683145480. Its totient is φ = 6837484032.

The previous prime is 13889474341. The next prime is 13889474359. The reversal of 13889474356 is 65347498831.

It can be written as a sum of positive squares in 4 ways, for example, as 919908900 + 12969565456 = 30330^2 + 113884^2 .

It is a super-2 number, since 2×13889474356² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13889474356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13889474359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124350 + ... + 207946.

It is an arithmetic number, because the mean of its divisors is an integer number (1028464395).

Almost surely, 2^13889474356 is an apocalyptic number.

It is an amenable number.

13889474356 is a deficient number, since it is larger than the sum of its proper divisors (10793671124).

13889474356 is a wasteful number, since it uses less digits than its factorization.

13889474356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84243 (or 84241 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 13889474356 in words is "thirteen billion, eight hundred eighty-nine million, four hundred seventy-four thousand, three hundred fifty-six".