19392596209981 has 2 divisors, whose sum is σ = 19392596209982. Its totient is φ = 19392596209980.

The previous prime is 19392596209979. The next prime is 19392596209997. The reversal of 19392596209981 is 18990269529391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18671343471225 + 721252738756 = 4321035^2 + 849266^2 .

It is a cyclic number.

It is not a de Polignac number, because 19392596209981 - 2¹ = 19392596209979 is a prime.

It is a super-2 number, since 2×19392596209981² (a number of 27 digits) contains 22 as substring.

Together with 19392596209979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19392596299981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9696298104990 + 9696298104991.

It is an arithmetic number, because the mean of its divisors is an integer number (9696298104991).

Almost surely, 2^{19392596209981} is an apocalyptic number.

It is an amenable number.

19392596209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

19392596209981 is an equidigital number, since it uses as much as digits as its factorization.

19392596209981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170061120, while the sum is 73.

The spelling of 19392596209981 in words is "nineteen trillion, three hundred ninety-two billion, five hundred ninety-six million, two hundred nine thousand, nine hundred eighty-one".