19788942 has 16 divisors (see below), whose sum is σ = 39640320. Its totient is φ = 6585912.

The previous prime is 19788941. The next prime is 19788953. The reversal of 19788942 is 24988791.

It is a junction number, because it is equal to n+sod(n) for n = 19788891 and 19788900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2203 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (2477520).

Almost surely, 2^19788942 is an apocalyptic number.

19788942 is an abundant number, since it is smaller than the sum of its proper divisors (19851378).

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

19788942 is a wasteful number, since it uses less digits than its factorization.

19788942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207.

The product of its digits is 290304, while the sum is 48.

The square root of 19788942 is about 4448.4763683760. The cubic root of 19788942 is about 270.4835504886.

The spelling of 19788942 in words is "nineteen million, seven hundred eighty-eight thousand, nine hundred forty-two".