18397829726201 has 2 divisors, whose sum is σ = 18397829726202. Its totient is φ = 18397829726200.

The previous prime is 18397829726147. The next prime is 18397829726293. The reversal of 18397829726201 is 10262792879381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16689839502400 + 1707990223801 = 4085320^2 + 1306901^2 .

It is a cyclic number.

It is not a de Polignac number, because 18397829726201 - 2³⁸ = 18122951819257 is a prime.

It is not a weakly prime, because it can be changed into another prime (18397829746201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198914863100 + 9198914863101.

It is an arithmetic number, because the mean of its divisors is an integer number (9198914863101).

Almost surely, 2^{18397829726201} is an apocalyptic number.

It is an amenable number.

18397829726201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18397829726201 is an equidigital number, since it uses as much as digits as its factorization.

18397829726201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 18397829726201 in words is "eighteen trillion, three hundred ninety-seven billion, eight hundred twenty-nine million, seven hundred twenty-six thousand, two hundred one".