19788042 has 8 divisors (see below), whose sum is σ = 39576096. Its totient is φ = 6596012.

The previous prime is 19788031. The next prime is 19788047. The reversal of 19788042 is 24088791.

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

19788042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (19788047) 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, 1648998 + ... + 1649009.

It is an arithmetic number, because the mean of its divisors is an integer number (4947012).

Almost surely, 2^19788042 is an apocalyptic number.

19788042 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.

19788042 is a wasteful number, since it uses less digits than its factorization.

19788042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298012.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 19788042 is about 4448.3752089949. The cubic root of 19788042 is about 270.4794499008.

The spelling of 19788042 in words is "nineteen million, seven hundred eighty-eight thousand, forty-two".