19478673 has 12 divisors (see below), whose sum is σ = 28613520. Its totient is φ = 12765336.

The previous prime is 19478671. The next prime is 19478681. The reversal of 19478673 is 37687491.

It is not a de Polignac number, because 19478673 - 2¹ = 19478671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19478671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17811 + ... + 18872.

It is an arithmetic number, because the mean of its divisors is an integer number (2384460).

Almost surely, 2^19478673 is an apocalyptic number.

It is an amenable number.

19478673 is a deficient number, since it is larger than the sum of its proper divisors (9134847).

19478673 is a wasteful number, since it uses less digits than its factorization.

19478673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36748 (or 36745 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 19478673 is about 4413.4649653079. The cubic root of 19478673 is about 269.0624685055.

The spelling of 19478673 in words is "nineteen million, four hundred seventy-eight thousand, six hundred seventy-three".