19495162189 has 2 divisors, whose sum is σ = 19495162190. Its totient is φ = 19495162188.

The previous prime is 19495162177. The next prime is 19495162223. The reversal of 19495162189 is 98126159491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13106357289 + 6388804900 = 114483^2 + 79930^2 .

It is a cyclic number.

It is not a de Polignac number, because 19495162189 - 2¹⁷ = 19495031117 is a prime.

It is a super-2 number, since 2×19495162189² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19495162129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747581094 + 9747581095.

It is an arithmetic number, because the mean of its divisors is an integer number (9747581095).

Almost surely, 2^19495162189 is an apocalyptic number.

It is an amenable number.

19495162189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19495162189 is an equidigital number, since it uses as much as digits as its factorization.

19495162189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 55.

The spelling of 19495162189 in words is "nineteen billion, four hundred ninety-five million, one hundred sixty-two thousand, one hundred eighty-nine".