19478994 has 8 divisors (see below), whose sum is σ = 38958000. Its totient is φ = 6492996.

The previous prime is 19478993. The next prime is 19479001. The reversal of 19478994 is 49987491.

It is a sphenic number, since it is the product of 3 distinct primes.

19478994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (19478993) 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, 1623244 + ... + 1623255.

It is an arithmetic number, because the mean of its divisors is an integer number (4869750).

Almost surely, 2^19478994 is an apocalyptic number.

19478994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19478994 is a wasteful number, since it uses less digits than its factorization.

19478994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246504.

The product of its digits is 653184, while the sum is 51.

The square root of 19478994 is about 4413.5013311429. The cubic root of 19478994 is about 269.0639465080.

The spelling of 19478994 in words is "nineteen million, four hundred seventy-eight thousand, nine hundred ninety-four".