20322021 has 8 divisors (see below), whose sum is σ = 28689984. Its totient is φ = 12751040.

The previous prime is 20322017. The next prime is 20322037. The reversal of 20322021 is 12022302.

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

It is a cyclic number.

It is not a de Polignac number, because 20322021 - 2² = 20322017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321988 and 20322006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20322061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199185 + ... + 199286.

It is an arithmetic number, because the mean of its divisors is an integer number (3586248).

Almost surely, 2^20322021 is an apocalyptic number.

It is an amenable number.

20322021 is a deficient number, since it is larger than the sum of its proper divisors (8367963).

20322021 is a wasteful number, since it uses less digits than its factorization.

20322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398491.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20322021 is about 4507.9952306985. The cubic root of 20322021 is about 272.8908444721.

Adding to 20322021 its reverse (12022302), we get a palindrome (32344323).

The spelling of 20322021 in words is "twenty million, three hundred twenty-two thousand, twenty-one".