20320300230556 has 48 divisors (see below), whose sum is σ = 39492950946624. Its totient is φ = 9099341070336.

The previous prime is 20320300230551. The next prime is 20320300230617. The reversal of 20320300230556 is 65503200302302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320300230551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33357525 + ... + 33961228.

It is an arithmetic number, because the mean of its divisors is an integer number (822769811388).

Almost surely, 2^{20320300230556} is an apocalyptic number.

It is an amenable number.

20320300230556 is a deficient number, since it is larger than the sum of its proper divisors (19172650716068).

20320300230556 is a wasteful number, since it uses less digits than its factorization.

20320300230556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67318990 (or 67318988 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 20320300230556 its reverse (65503200302302), we get a palindrome (85823500532858).

The spelling of 20320300230556 in words is "twenty trillion, three hundred twenty billion, three hundred million, two hundred thirty thousand, five hundred fifty-six".