13919181380 has 48 divisors (see below), whose sum is σ = 31665128880. Its totient is φ = 5139373824.

The previous prime is 13919181373. The next prime is 13919181401. The reversal of 13919181380 is 8318191931.

It can be written as a sum of positive squares in 8 ways, for example, as 8254812736 + 5664368644 = 90856^2 + 75262^2 .

It is a super-2 number, since 2×13919181380² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114449 + ... + 202328.

It is an arithmetic number, because the mean of its divisors is an integer number (659690185).

Almost surely, 2^13919181380 is an apocalyptic number.

13919181380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13919181380 is an abundant number, since it is smaller than the sum of its proper divisors (17745947500).

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

13919181380 is a wasteful number, since it uses less digits than its factorization.

13919181380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316825 (or 316797 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 13919181380 in words is "thirteen billion, nine hundred nineteen million, one hundred eighty-one thousand, three hundred eighty".