20631433230 has 96 divisors (see below), whose sum is σ = 54069634944. Its totient is φ = 5457958848.

The previous prime is 20631433219. The next prime is 20631433259. The reversal of 20631433230 is 3233413602.

It is a happy number.

20631433230 is a `hidden beast` number, since 2 + 0 + 631 + 4 + 3 + 3 + 23 + 0 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20631433194 and 20631433203.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 11544397 + ... + 11546183.

It is an arithmetic number, because the mean of its divisors is an integer number (563225364).

Almost surely, 2^20631433230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20631433230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27034817472).

20631433230 is an abundant number, since it is smaller than the sum of its proper divisors (33438201714).

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

20631433230 is a wasteful number, since it uses less digits than its factorization.

20631433230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 20631433230 its reverse (3233413602), we get a palindrome (23864846832).

The spelling of 20631433230 in words is "twenty billion, six hundred thirty-one million, four hundred thirty-three thousand, two hundred thirty".