2019840042 has 16 divisors (see below), whose sum is σ = 4406923872. Its totient is φ = 612072720.

The previous prime is 2019840041. The next prime is 2019840047. The reversal of 2019840042 is 2400489102.

It is a junction number, because it is equal to n+sod(n) for n = 2019839991 and 2019840009.

It is not an unprimeable number, because it can be changed into a prime (2019840041) 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, 15301753 + ... + 15301884.

It is an arithmetic number, because the mean of its divisors is an integer number (275432742).

Almost surely, 2^2019840042 is an apocalyptic number.

2019840042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2019840042 is an abundant number, since it is smaller than the sum of its proper divisors (2387083830).

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

2019840042 is a wasteful number, since it uses less digits than its factorization.

2019840042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30603653.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2019840042 is about 44942.6305638644. The cubic root of 2019840042 is about 1264.0734969848.

The spelling of 2019840042 in words is "two billion, nineteen million, eight hundred forty thousand, forty-two".