19889013 has 8 divisors (see below), whose sum is σ = 26540800. Its totient is φ = 13248288.

The previous prime is 19888969. The next prime is 19889027. The reversal of 19889013 is 31098891.

It is a happy number.

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

It is not a de Polignac number, because 19889013 - 2¹⁸ = 19626869 is a prime.

It is a super-2 number, since 2×19889013² = 791145676228338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19889033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3393 + ... + 7161.

It is an arithmetic number, because the mean of its divisors is an integer number (3317600).

Almost surely, 2^19889013 is an apocalyptic number.

It is an amenable number.

19889013 is a deficient number, since it is larger than the sum of its proper divisors (6651787).

19889013 is a wasteful number, since it uses less digits than its factorization.

19889013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 19889013 is about 4459.7099681482. The cubic root of 19889013 is about 270.9387215469.

The spelling of 19889013 in words is "nineteen million, eight hundred eighty-nine thousand, thirteen".