13118221928 has 32 divisors (see below), whose sum is σ = 28426334400. Its totient is φ = 5558923392.

The previous prime is 13118221859. The next prime is 13118221939. The reversal of 13118221928 is 82912281131.

It is a junction number, because it is equal to n+sod(n) for n = 13118221891 and 13118221900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311050 + ... + 1321017.

It is an arithmetic number, because the mean of its divisors is an integer number (888322950).

Almost surely, 2^13118221928 is an apocalyptic number.

It is an amenable number.

13118221928 is an abundant number, since it is smaller than the sum of its proper divisors (15308112472).

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

13118221928 is a wasteful number, since it uses less digits than its factorization.

13118221928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632169 (or 2632165 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The spelling of 13118221928 in words is "thirteen billion, one hundred eighteen million, two hundred twenty-one thousand, nine hundred twenty-eight".