20643122330 has 16 divisors (see below), whose sum is σ = 37167552000. Its totient is φ = 8255041872.

The previous prime is 20643122323. The next prime is 20643122351. The reversal of 20643122330 is 3322134602.

It is a super-2 number, since 2×20643122330² (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 20643122330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236330 + ... + 311669.

It is an arithmetic number, because the mean of its divisors is an integer number (2322972000).

Almost surely, 2^20643122330 is an apocalyptic number.

20643122330 is a deficient number, since it is larger than the sum of its proper divisors (16524429670).

20643122330 is a wasteful number, since it uses less digits than its factorization.

20643122330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551773.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 20643122330 its reverse (3322134602), we get a palindrome (23965256932).

The spelling of 20643122330 in words is "twenty billion, six hundred forty-three million, one hundred twenty-two thousand, three hundred thirty".