13781118042 has 24 divisors (see below), whose sum is σ = 29886202944. Its totient is φ = 4589534664.

The previous prime is 13781118037. The next prime is 13781118049. The reversal of 13781118042 is 24081118731.

It is a junction number, because it is equal to n+sod(n) for n = 13781117988 and 13781118006.

It is not an unprimeable number, because it can be changed into a prime (13781118049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 327208 + ... + 366915.

It is an arithmetic number, because the mean of its divisors is an integer number (1245258456).

Almost surely, 2^13781118042 is an apocalyptic number.

13781118042 is an abundant number, since it is smaller than the sum of its proper divisors (16105084902).

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

13781118042 is a wasteful number, since it uses less digits than its factorization.

13781118042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695234 (or 695231 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 13781118042 in words is "thirteen billion, seven hundred eighty-one million, one hundred eighteen thousand, forty-two".