2019150820 has 24 divisors (see below), whose sum is σ = 4241220984. Its totient is φ = 807469056.

The previous prime is 2019150817. The next prime is 2019150827. The reversal of 2019150820 is 280519102.

It can be written as a sum of positive squares in 4 ways, for example, as 902521764 + 1116629056 = 30042^2 + 33416^2 .

It is not an unprimeable number, because it can be changed into a prime (2019150827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100324 + ... + 118756.

It is an arithmetic number, because the mean of its divisors is an integer number (176717541).

Almost surely, 2^2019150820 is an apocalyptic number.

2019150820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2019150820 is an abundant number, since it is smaller than the sum of its proper divisors (2222070164).

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

2019150820 is a wasteful number, since it uses less digits than its factorization.

2019150820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23919 (or 23917 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 2019150820 is about 44934.9621119235. The cubic root of 2019150820 is about 1263.9297023675.

Adding to 2019150820 its reverse (280519102), we get a palindrome (2299669922).

The spelling of 2019150820 in words is "two billion, nineteen million, one hundred fifty thousand, eight hundred twenty".