19888129 has 8 divisors (see below), whose sum is σ = 20487168. Its totient is φ = 19292400.

The previous prime is 19888111. The next prime is 19888177. The reversal of 19888129 is 92188891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19888129 - 2²¹ = 17790977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19888109) 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 7 ways as a sum of consecutive naturals, for example, 16704 + ... + 17854.

It is an arithmetic number, because the mean of its divisors is an integer number (2560896).

Almost surely, 2^19888129 is an apocalyptic number.

It is an amenable number.

19888129 is a deficient number, since it is larger than the sum of its proper divisors (599039).

19888129 is a wasteful number, since it uses less digits than its factorization.

19888129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its digits is 82944, while the sum is 46.

The square root of 19888129 is about 4459.6108574628. The cubic root of 19888129 is about 270.9347073812.

The spelling of 19888129 in words is "nineteen million, eight hundred eighty-eight thousand, one hundred twenty-nine".