1820386020582 has 32 divisors (see below), whose sum is σ = 4045395243360. Its totient is φ = 606781393920.

The previous prime is 1820386020577. The next prime is 1820386020589. The reversal of 1820386020582 is 2850206830281.

1820386020582 is a `hidden beast` number, since 1 + 8 + 2 + 0 + 3 + 8 + 60 + 2 + 0 + 582 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820386020589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2134482 + ... + 2863002.

It is an arithmetic number, because the mean of its divisors is an integer number (126418601355).

Almost surely, 2^{1820386020582} is an apocalyptic number.

1820386020582 is an abundant number, since it is smaller than the sum of its proper divisors (2225009222778).

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

1820386020582 is a wasteful number, since it uses less digits than its factorization.

1820386020582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774805 (or 774799 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 1820386020582 in words is "one trillion, eight hundred twenty billion, three hundred eighty-six million, twenty thousand, five hundred eighty-two".