20330321636 has 6 divisors (see below), whose sum is σ = 35578062870. Its totient is φ = 10165160816.

The previous prime is 20330321603. The next prime is 20330321647. The reversal of 20330321636 is 63612303302.

It can be written as a sum of positive squares in only one way, i.e., 19406161636 + 924160000 = 139306^2 + 30400^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20330321599 and 20330321608.

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 as a sum of consecutive naturals, namely, 2541290201 + ... + 2541290208.

It is an arithmetic number, because the mean of its divisors is an integer number (5929677145).

Almost surely, 2^20330321636 is an apocalyptic number.

It is an amenable number.

20330321636 is a deficient number, since it is larger than the sum of its proper divisors (15247741234).

20330321636 is a wasteful number, since it uses less digits than its factorization.

20330321636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082580413 (or 5082580411 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 20330321636 its reverse (63612303302), we get a palindrome (83942624938).

The spelling of 20330321636 in words is "twenty billion, three hundred thirty million, three hundred twenty-one thousand, six hundred thirty-six".