13826381945 has 16 divisors (see below), whose sum is σ = 17779305600. Its totient is φ = 10285019904.

The previous prime is 13826381941. The next prime is 13826381983. The reversal of 13826381945 is 54918362831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13826381945 - 2² = 13826381941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13826381893 and 13826381902.

It is not an unprimeable number, because it can be changed into a prime (13826381941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972845 + ... + 986954.

It is an arithmetic number, because the mean of its divisors is an integer number (1111206600).

Almost surely, 2^13826381945 is an apocalyptic number.

It is an amenable number.

13826381945 is a deficient number, since it is larger than the sum of its proper divisors (3952923655).

13826381945 is a wasteful number, since it uses less digits than its factorization.

13826381945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959904.

The product of its digits is 1244160, while the sum is 50.

The spelling of 13826381945 in words is "thirteen billion, eight hundred twenty-six million, three hundred eighty-one thousand, nine hundred forty-five".