20210321220030 has 24 divisors (see below), whose sum is σ = 52546835172312. Its totient is φ = 5389418991984.

The previous prime is 20210321220029. The next prime is 20210321220059. The reversal of 20210321220030 is 3002212301202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20210321219985 and 20210321220012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112279562244 + ... + 112279562423.

It is an arithmetic number, because the mean of its divisors is an integer number (2189451465513).

Almost surely, 2^{20210321220030} is an apocalyptic number.

20210321220030 is an abundant number, since it is smaller than the sum of its proper divisors (32336513952282).

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

20210321220030 is a wasteful number, since it uses less digits than its factorization.

20210321220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224559124680 (or 224559124677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20210321220030 its reverse (3002212301202), we get a palindrome (23212533521232).

The spelling of 20210321220030 in words is "twenty trillion, two hundred ten billion, three hundred twenty-one million, two hundred twenty thousand, thirty".