20220312 has 64 divisors (see below), whose sum is σ = 60295680. Its totient is φ = 5524992.

The previous prime is 20220311. The next prime is 20220323. The reversal of 20220312 is 21302202.

It is a super-2 number, since 2×20220312² = 817722034754688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (942120).

Almost surely, 2^20220312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20220312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30147840).

20220312 is an abundant number, since it is smaller than the sum of its proper divisors (40075368).

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

20220312 is a wasteful number, since it uses less digits than its factorization.

20220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272 (or 5268 counting only the distinct ones).

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

The square root of 20220312 is about 4496.7001234238. The cubic root of 20220312 is about 272.4348221077.

Adding to 20220312 its reverse (21302202), we get a palindrome (41522514).

The spelling of 20220312 in words is "twenty million, two hundred twenty thousand, three hundred twelve".