20223312 has 80 divisors (see below), whose sum is σ = 54847680. Its totient is φ = 6414336.

The previous prime is 20223283. The next prime is 20223341. The reversal of 20223312 is 21332202.

It is an interprime number because it is at equal distance from previous prime (20223283) and next prime (20223341).

It is a junction number, because it is equal to n+sod(n) for n = 20223291 and 20223300.

It is a congruent number.

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, 104688 + ... + 104880.

It is an arithmetic number, because the mean of its divisors is an integer number (685596).

Almost surely, 2^20223312 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 20223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27423840).

20223312 is an abundant number, since it is smaller than the sum of its proper divisors (34624368).

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

20223312 is a wasteful number, since it uses less digits than its factorization.

20223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20223312 is about 4497.0336889999. The cubic root of 20223312 is about 272.4482947658.

Adding to 20223312 its reverse (21332202), we get a palindrome (41555514).

The spelling of 20223312 in words is "twenty million, two hundred twenty-three thousand, three hundred twelve".