1849516820 has 24 divisors (see below), whose sum is σ = 3884864424. Its totient is φ = 739639296.

The previous prime is 1849516813. The next prime is 1849516849. The reversal of 1849516820 is 286159481.

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 1849516036 = 28^2 + 43006^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119444 + ... + 134036.

It is an arithmetic number, because the mean of its divisors is an integer number (161869351).

Almost surely, 2^1849516820 is an apocalyptic number.

1849516820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1849516820 is an abundant number, since it is smaller than the sum of its proper divisors (2035347604).

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

1849516820 is a wasteful number, since it uses less digits than its factorization.

1849516820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20939 (or 20937 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1849516820 is about 43006.0091150062. The cubic root of 1849516820 is about 1227.4941426046.

The spelling of 1849516820 in words is "one billion, eight hundred forty-nine million, five hundred sixteen thousand, eight hundred twenty".