1820012322 has 8 divisors (see below), whose sum is σ = 3640024656. Its totient is φ = 606670772.

The previous prime is 1820012317. The next prime is 1820012323. The reversal of 1820012322 is 2232100281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1820012322 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1820012323) 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 3 ways as a sum of consecutive naturals, for example, 151667688 + ... + 151667699.

It is an arithmetic number, because the mean of its divisors is an integer number (455003082).

Almost surely, 2^1820012322 is an apocalyptic number.

1820012322 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1820012322 is a wasteful number, since it uses less digits than its factorization.

1820012322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303335392.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1820012322 is about 42661.6024312261. The cubic root of 1820012322 is about 1220.9319051049.

The spelling of 1820012322 in words is "one billion, eight hundred twenty million, twelve thousand, three hundred twenty-two".