2019849140 has 12 divisors (see below), whose sum is σ = 4241683236. Its totient is φ = 807939648.

The previous prime is 2019849127. The next prime is 2019849149. The reversal of 2019849140 is 419489102.

It can be written as a sum of positive squares in 2 ways, for example, as 1169776804 + 850072336 = 34202^2 + 29156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2019849094 and 2019849103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019849149) 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, 50496209 + ... + 50496248.

It is an arithmetic number, because the mean of its divisors is an integer number (353473603).

Almost surely, 2^2019849140 is an apocalyptic number.

2019849140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2019849140 is an abundant number, since it is smaller than the sum of its proper divisors (2221834096).

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

2019849140 is a wasteful number, since it uses less digits than its factorization.

2019849140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100992466 (or 100992464 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 2019849140 is about 44942.7317816797. The cubic root of 2019849140 is about 1264.0753949112.

The spelling of 2019849140 in words is "two billion, nineteen million, eight hundred forty-nine thousand, one hundred forty".