18970182214561 has 2 divisors, whose sum is σ = 18970182214562. Its totient is φ = 18970182214560.

The previous prime is 18970182214523. The next prime is 18970182214603. The reversal of 18970182214561 is 16541228107981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16804104716961 + 2166077497600 = 4099281^2 + 1471760^2 .

It is an emirp because it is prime and its reverse (16541228107981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18970182214561 - 2¹³ = 18970182206369 is a prime.

It is not a weakly prime, because it can be changed into another prime (18970182214261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485091107280 + 9485091107281.

It is an arithmetic number, because the mean of its divisors is an integer number (9485091107281).

Almost surely, 2^{18970182214561} is an apocalyptic number.

It is an amenable number.

18970182214561 is a deficient number, since it is larger than the sum of its proper divisors (1).

18970182214561 is an equidigital number, since it uses as much as digits as its factorization.

18970182214561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 18970182214561 in words is "eighteen trillion, nine hundred seventy billion, one hundred eighty-two million, two hundred fourteen thousand, five hundred sixty-one".