1820382006021 has 16 divisors (see below), whose sum is σ = 2494025554944. Its totient is φ = 1180480053744.

The previous prime is 1820382006017. The next prime is 1820382006067. The reversal of 1820382006021 is 1206002830281.

It is not a de Polignac number, because 1820382006021 - 2² = 1820382006017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820382006221) 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, 39579811 + ... + 39625776.

It is an arithmetic number, because the mean of its divisors is an integer number (155876597184).

Almost surely, 2^{1820382006021} is an apocalyptic number.

It is an amenable number.

1820382006021 is a deficient number, since it is larger than the sum of its proper divisors (673643548923).

1820382006021 is a wasteful number, since it uses less digits than its factorization.

1820382006021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79205800.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 1820382006021 in words is "one trillion, eight hundred twenty billion, three hundred eighty-two million, six thousand, twenty-one".