20430235756356 has 48 divisors (see below), whose sum is σ = 50179973625600. Its totient is φ = 6451595898912.

The previous prime is 20430235756319. The next prime is 20430235756459. The reversal of 20430235756356 is 65365753203402.

It is a junction number, because it is equal to n+sod(n) for n = 20430235756299 and 20430235756308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30458035 + ... + 31121573.

It is an arithmetic number, because the mean of its divisors is an integer number (1045416117200).

Almost surely, 2^{20430235756356} is an apocalyptic number.

It is an amenable number.

20430235756356 is an abundant number, since it is smaller than the sum of its proper divisors (29749737869244).

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

20430235756356 is a wasteful number, since it uses less digits than its factorization.

20430235756356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798608 (or 798606 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 51.

Adding to 20430235756356 its reverse (65365753203402), we get a palindrome (85795988959758).

The spelling of 20430235756356 in words is "twenty trillion, four hundred thirty billion, two hundred thirty-five million, seven hundred fifty-six thousand, three hundred fifty-six".