19470145142689 has 2 divisors, whose sum is σ = 19470145142690. Its totient is φ = 19470145142688.

The previous prime is 19470145142603. The next prime is 19470145142731. The reversal of 19470145142689 is 98624154107491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18713480024464 + 756665118225 = 4325908^2 + 869865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19470145142689 is a prime.

It is not a weakly prime, because it can be changed into another prime (19470145140689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9735072571344 + 9735072571345.

It is an arithmetic number, because the mean of its divisors is an integer number (9735072571345).

Almost surely, 2^{19470145142689} is an apocalyptic number.

It is an amenable number.

19470145142689 is a deficient number, since it is larger than the sum of its proper divisors (1).

19470145142689 is an equidigital number, since it uses as much as digits as its factorization.

19470145142689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 19470145142689 in words is "nineteen trillion, four hundred seventy billion, one hundred forty-five million, one hundred forty-two thousand, six hundred eighty-nine".