821340022 has 8 divisors (see below), whose sum is σ = 1232143776. Its totient is φ = 410625432.

The previous prime is 821339983. The next prime is 821340043. The reversal of 821340022 is 220043128.

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

It is a junction number, because it is equal to n+sod(n) for n = 821339975 and 821340002.

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, 10228 + ... + 41800.

It is an arithmetic number, because the mean of its divisors is an integer number (154017972).

Almost surely, 2^821340022 is an apocalyptic number.

821340022 is a deficient number, since it is larger than the sum of its proper divisors (410803754).

821340022 is a wasteful number, since it uses less digits than its factorization.

821340022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44582.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 821340022 is about 28659.0303743864. The cubic root of 821340022 is about 936.4997415051.

The spelling of 821340022 in words is "eight hundred twenty-one million, three hundred forty thousand, twenty-two".