20222454021 has 32 divisors (see below), whose sum is σ = 33741619200. Its totient is φ = 10466086080.

The previous prime is 20222454001. The next prime is 20222454071. The reversal of 20222454021 is 12045422202.

It is not a de Polignac number, because 20222454021 - 2⁷ = 20222453893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20222453982 and 20222454000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222454001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100581 + ... + 224858.

It is an arithmetic number, because the mean of its divisors is an integer number (1054425600).

Almost surely, 2^20222454021 is an apocalyptic number.

20222454021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20222454021 is a deficient number, since it is larger than the sum of its proper divisors (13519165179).

20222454021 is a wasteful number, since it uses less digits than its factorization.

20222454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325729.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20222454021 its reverse (12045422202), we get a palindrome (32267876223).

The spelling of 20222454021 in words is "twenty billion, two hundred twenty-two million, four hundred fifty-four thousand, twenty-one".