20221303312 has 40 divisors (see below), whose sum is σ = 45728430336. Its totient is φ = 8481881856.

The previous prime is 20221303303. The next prime is 20221303351. The reversal of 20221303312 is 21330312202.

It is a super-2 number, since 2×20221303312² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20221303312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1915453 + ... + 1925980.

Almost surely, 2^20221303312 is an apocalyptic number.

It is an amenable number.

20221303312 is an abundant number, since it is smaller than the sum of its proper divisors (25507127024).

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

20221303312 is a wasteful number, since it uses less digits than its factorization.

20221303312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841495 (or 3841489 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20221303312 its reverse (21330312202), we get a palindrome (41551615514).

The spelling of 20221303312 in words is "twenty billion, two hundred twenty-one million, three hundred three thousand, three hundred twelve".