19889049 has 4 divisors (see below), whose sum is σ = 26518736. Its totient is φ = 13259364.

The previous prime is 19889047. The next prime is 19889057. The reversal of 19889049 is 94098891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19889049 - 2¹ = 19889047 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19888989 and 19889007.

It is not an unprimeable number, because it can be changed into a prime (19889047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3314839 + ... + 3314844.

It is an arithmetic number, because the mean of its divisors is an integer number (6629684).

Almost surely, 2^19889049 is an apocalyptic number.

It is an amenable number.

19889049 is a deficient number, since it is larger than the sum of its proper divisors (6629687).

19889049 is an equidigital number, since it uses as much as digits as its factorization.

19889049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629686.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 19889049 is about 4459.7140042832. The cubic root of 19889049 is about 270.9388850172.

The spelling of 19889049 in words is "nineteen million, eight hundred eighty-nine thousand, forty-nine".