1820639022 has 8 divisors (see below), whose sum is σ = 3641278056. Its totient is φ = 606879672.

The previous prime is 1820639017. The next prime is 1820639069. The reversal of 1820639022 is 2209360281.

It is a happy number.

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

1820639022 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 151719913 + ... + 151719924.

It is an arithmetic number, because the mean of its divisors is an integer number (455159757).

Almost surely, 2^1820639022 is an apocalyptic number.

1820639022 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.

1820639022 is a wasteful number, since it uses less digits than its factorization.

1820639022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303439842.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1820639022 is about 42668.9468114693. The cubic root of 1820639022 is about 1221.0720269066.

The spelling of 1820639022 in words is "one billion, eight hundred twenty million, six hundred thirty-nine thousand, twenty-two".