20220321 has 8 divisors (see below), whose sum is σ = 29411424. Its totient is φ = 12254720.

The previous prime is 20220311. The next prime is 20220323. The reversal of 20220321 is 12302202.

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 20220321 - 2⁹ = 20219809 is a prime.

It is a super-2 number, since 2×20220321² = 817722762686082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20220297 and 20220306.

It is not an unprimeable number, because it can be changed into a prime (20220323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306336 + ... + 306401.

It is an arithmetic number, because the mean of its divisors is an integer number (3676428).

Almost surely, 2^20220321 is an apocalyptic number.

It is an amenable number.

20220321 is a deficient number, since it is larger than the sum of its proper divisors (9191103).

20220321 is a wasteful number, since it uses less digits than its factorization.

20220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612751.

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

The square root of 20220321 is about 4496.7011241576. The cubic root of 20220321 is about 272.4348625277.

Adding to 20220321 its reverse (12302202), we get a palindrome (32522523).

The spelling of 20220321 in words is "twenty million, two hundred twenty thousand, three hundred twenty-one".