19234085989 has 2 divisors, whose sum is σ = 19234085990. Its totient is φ = 19234085988.

The previous prime is 19234085987. The next prime is 19234086017. The reversal of 19234085989 is 98958043291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11341185025 + 7892900964 = 106495^2 + 88842^2 .

It is a cyclic number.

It is not a de Polignac number, because 19234085989 - 2¹ = 19234085987 is a prime.

It is a super-2 number, since 2×19234085989² (a number of 21 digits) contains 22 as substring.

Together with 19234085987, 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 (19234085987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9617042994 + 9617042995.

It is an arithmetic number, because the mean of its divisors is an integer number (9617042995).

Almost surely, 2^19234085989 is an apocalyptic number.

It is an amenable number.

19234085989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19234085989 is an equidigital number, since it uses as much as digits as its factorization.

19234085989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 19234085989 in words is "nineteen billion, two hundred thirty-four million, eighty-five thousand, nine hundred eighty-nine".