2050817820 has 48 divisors (see below), whose sum is σ = 6044519040. Its totient is φ = 518101056.

The previous prime is 2050817779. The next prime is 2050817851. The reversal of 2050817820 is 287180502.

It is a super-3 number, since 3×2050817820³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898342 + ... + 900621.

It is an arithmetic number, because the mean of its divisors is an integer number (125927480).

Almost surely, 2^2050817820 is an apocalyptic number.

2050817820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2050817820 is an abundant number, since it is smaller than the sum of its proper divisors (3993701220).

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

2050817820 is a wasteful number, since it uses less digits than its factorization.

2050817820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798994 (or 1798992 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 2050817820 is about 45285.9561012021. The cubic root of 2050817820 is about 1270.5029978954.

The spelling of 2050817820 in words is "two billion, fifty million, eight hundred seventeen thousand, eight hundred twenty".