13817721053 has 2 divisors, whose sum is σ = 13817721054. Its totient is φ = 13817721052.

The previous prime is 13817721041. The next prime is 13817721059. The reversal of 13817721053 is 35012771831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11671993369 + 2145727684 = 108037^2 + 46322^2 .

It is a cyclic number.

It is not a de Polignac number, because 13817721053 - 2²⁰ = 13816672477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13817720998 and 13817721016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13817721059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6908860526 + 6908860527.

It is an arithmetic number, because the mean of its divisors is an integer number (6908860527).

Almost surely, 2^13817721053 is an apocalyptic number.

It is an amenable number.

13817721053 is a deficient number, since it is larger than the sum of its proper divisors (1).

13817721053 is an equidigital number, since it uses as much as digits as its factorization.

13817721053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 13817721053 in words is "thirteen billion, eight hundred seventeen million, seven hundred twenty-one thousand, fifty-three".