19504989 has 48 divisors (see below), whose sum is σ = 35130240. Its totient is φ = 10644480.

The previous prime is 19504951. The next prime is 19504997. The reversal of 19504989 is 98940591.

It is not a de Polignac number, because 19504989 - 2⁷ = 19504861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19504909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30109 + ... + 30749.

It is an arithmetic number, because the mean of its divisors is an integer number (731880).

Almost surely, 2^19504989 is an apocalyptic number.

It is an amenable number.

19504989 is a deficient number, since it is larger than the sum of its proper divisors (15625251).

19504989 is a wasteful number, since it uses less digits than its factorization.

19504989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 19504989 is about 4416.4452900495. The cubic root of 19504989 is about 269.1835832177.

The spelling of 19504989 in words is "nineteen million, five hundred four thousand, nine hundred eighty-nine".