19788342 has 32 divisors (see below), whose sum is σ = 46286592. Its totient is φ = 5521824.

The previous prime is 19788337. The next prime is 19788343. The reversal of 19788342 is 24388791.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 19788294 and 19788303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3673 + ... + 7284.

It is an arithmetic number, because the mean of its divisors is an integer number (1446456).

Almost surely, 2^19788342 is an apocalyptic number.

19788342 is an abundant number, since it is smaller than the sum of its proper divisors (26498250).

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

19788342 is a wasteful number, since it uses less digits than its factorization.

19788342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11012.

The product of its digits is 96768, while the sum is 42.

The square root of 19788342 is about 4448.4089290442. The cubic root of 19788342 is about 270.4808167772.

The spelling of 19788342 in words is "nineteen million, seven hundred eighty-eight thousand, three hundred forty-two".