19061309889 has 12 divisors (see below), whose sum is σ = 27534502372. Its totient is φ = 12706848000.

The previous prime is 19061309879. The next prime is 19061309929. The reversal of 19061309889 is 98890316091.

19061309889 is a `hidden beast` number, since 19 + 0 + 613 + 0 + 9 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13521038400 + 5540271489 = 116280^2 + 74433^2 .

It is not a de Polignac number, because 19061309889 - 2¹² = 19061305793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19061309819) 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 in 11 ways as a sum of consecutive naturals, for example, 160089 + ... + 252489.

Almost surely, 2^19061309889 is an apocalyptic number.

It is an amenable number.

19061309889 is a deficient number, since it is larger than the sum of its proper divisors (8473192483).

19061309889 is a wasteful number, since it uses less digits than its factorization.

19061309889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115328 (or 115325 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 19061309889 in words is "nineteen billion, sixty-one million, three hundred nine thousand, eight hundred eighty-nine".