19689129 has 16 divisors (see below), whose sum is σ = 29721600. Its totient is φ = 12877488.

The previous prime is 19689121. The next prime is 19689151. The reversal of 19689129 is 92198691.

It is not a de Polignac number, because 19689129 - 2³ = 19689121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19689121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5449 + ... + 8310.

It is an arithmetic number, because the mean of its divisors is an integer number (1857600).

Almost surely, 2^19689129 is an apocalyptic number.

It is an amenable number.

19689129 is a deficient number, since it is larger than the sum of its proper divisors (10032471).

19689129 is a wasteful number, since it uses less digits than its factorization.

19689129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13821 (or 13815 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19689129 is about 4437.2434010318. The cubic root of 19689129 is about 270.0280217830.

The spelling of 19689129 in words is "nineteen million, six hundred eighty-nine thousand, one hundred twenty-nine".