13103978040 has 128 divisors (see below), whose sum is σ = 43863552000. Its totient is φ = 3479704704.

The previous prime is 13103977993. The next prime is 13103978051. The reversal of 13103978040 is 4087930131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13103977986 and 13103978004.

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, 232737 + ... + 283503.

It is an arithmetic number, because the mean of its divisors is an integer number (342684000).

Almost surely, 2^13103978040 is an apocalyptic number.

13103978040 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 13103978040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21931776000).

13103978040 is an abundant number, since it is smaller than the sum of its proper divisors (30759573960).

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

13103978040 is a wasteful number, since it uses less digits than its factorization.

13103978040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51026 (or 51016 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 13103978040 in words is "thirteen billion, one hundred three million, nine hundred seventy-eight thousand, forty".