19089545904 has 240 divisors, whose sum is σ = 64226722560. Its totient is φ = 5215311360.

The previous prime is 19089545899. The next prime is 19089545927. The reversal of 19089545904 is 40954598091.

19089545904 is a `hidden beast` number, since 1 + 9 + 0 + 8 + 9 + 545 + 90 + 4 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 874677 + ... + 896235.

It is an arithmetic number, because the mean of its divisors is an integer number (267611344).

Almost surely, 2^19089545904 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 19089545904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32113361280).

19089545904 is an abundant number, since it is smaller than the sum of its proper divisors (45137176656).

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

19089545904 is a wasteful number, since it uses less digits than its factorization.

19089545904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21640 (or 21631 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 19089545904 in words is "nineteen billion, eighty-nine million, five hundred forty-five thousand, nine hundred four".