20022330312 has 48 divisors (see below), whose sum is σ = 57416980140. Its totient is φ = 6281515008.

The previous prime is 20022330311. The next prime is 20022330379. The reversal of 20022330312 is 21303322002.

It is a happy number.

20022330312 is a `hidden beast` number, since 2 + 0 + 0 + 22 + 330 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17724661956 + 2297668356 = 133134^2 + 47934^2 .

It is a super-2 number, since 2×20022330312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20022330311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8177833 + ... + 8180280.

Almost surely, 2^20022330312 is an apocalyptic number.

It is an amenable number.

20022330312 is an abundant number, since it is smaller than the sum of its proper divisors (37394649828).

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

20022330312 is a wasteful number, since it uses less digits than its factorization.

20022330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16358142 (or 16358135 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20022330312 its reverse (21303322002), we get a palindrome (41325652314).

The spelling of 20022330312 in words is "twenty billion, twenty-two million, three hundred thirty thousand, three hundred twelve".