13926113921 has 2 divisors, whose sum is σ = 13926113922. Its totient is φ = 13926113920.

The previous prime is 13926113891. The next prime is 13926113923. The reversal of 13926113921 is 12931162931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10949320321 + 2976793600 = 104639^2 + 54560^2 .

It is a cyclic number.

It is not a de Polignac number, because 13926113921 - 2¹⁸ = 13925851777 is a prime.

Together with 13926113923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13926113923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6963056960 + 6963056961.

It is an arithmetic number, because the mean of its divisors is an integer number (6963056961).

Almost surely, 2^13926113921 is an apocalyptic number.

It is an amenable number.

13926113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13926113921 is an equidigital number, since it uses as much as digits as its factorization.

13926113921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The spelling of 13926113921 in words is "thirteen billion, nine hundred twenty-six million, one hundred thirteen thousand, nine hundred twenty-one".