20221212320 has 96 divisors (see below), whose sum is σ = 48983574528. Its totient is φ = 7884832768.

The previous prime is 20221212311. The next prime is 20221212331. The reversal of 20221212320 is 2321212202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1927409 + ... + 1937871.

It is an arithmetic number, because the mean of its divisors is an integer number (510245568).

Almost surely, 2^20221212320 is an apocalyptic number.

20221212320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20221212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24491787264).

20221212320 is an abundant number, since it is smaller than the sum of its proper divisors (28762362208).

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

20221212320 is a wasteful number, since it uses less digits than its factorization.

20221212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10782 (or 10774 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20221212320 its reverse (2321212202), we get a palindrome (22542424522).

The spelling of 20221212320 in words is "twenty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred twenty".