20221210224 has 80 divisors (see below), whose sum is σ = 59914736640. Its totient is φ = 6522966720.

The previous prime is 20221210223. The next prime is 20221210241. The reversal of 20221210224 is 42201212202.

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 = 20221210197 and 20221210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221210223) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 741582 + ... + 768365.

It is an arithmetic number, because the mean of its divisors is an integer number (748934208).

Almost surely, 2^20221210224 is an apocalyptic number.

20221210224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20221210224 is an abundant number, since it is smaller than the sum of its proper divisors (39693526416).

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

20221210224 is a wasteful number, since it uses less digits than its factorization.

20221210224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509995 (or 1509983 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20221210224 its reverse (42201212202), we get a palindrome (62422422426).

The spelling of 20221210224 in words is "twenty billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-four".