13111918320 has 160 divisors (see below), whose sum is σ = 40997376000. Its totient is φ = 3466524672.

The previous prime is 13111918283. The next prime is 13111918331. The reversal of 13111918320 is 2381911131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21889381 + ... + 21889979.

It is an arithmetic number, because the mean of its divisors is an integer number (256233600).

Almost surely, 2^13111918320 is an apocalyptic number.

13111918320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13111918320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20498688000).

13111918320 is an abundant number, since it is smaller than the sum of its proper divisors (27885457680).

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

13111918320 is a wasteful number, since it uses less digits than its factorization.

13111918320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 13111918320 in words is "thirteen billion, one hundred eleven million, nine hundred eighteen thousand, three hundred twenty".