19045904 has 80 divisors (see below), whose sum is σ = 41902080. Its totient is φ = 8346240.

The previous prime is 19045891. The next prime is 19045907. The reversal of 19045904 is 40954091.

It is not an unprimeable number, because it can be changed into a prime (19045907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405209 + ... + 405255.

It is an arithmetic number, because the mean of its divisors is an integer number (523776).

Almost surely, 2^19045904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19045904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20951040).

19045904 is an abundant number, since it is smaller than the sum of its proper divisors (22856176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19045904 is a wasteful number, since it uses less digits than its factorization.

19045904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 19045904 is about 4364.1613169084. The cubic root of 19045904 is about 267.0548873212.

Adding to 19045904 its reverse (40954091), we get a palindrome (59999995).

The spelling of 19045904 in words is "nineteen million, forty-five thousand, nine hundred four".