20326431633 has 16 divisors (see below), whose sum is σ = 29621822976. Its totient is φ = 12342424320.

The previous prime is 20326431623. The next prime is 20326431641. The reversal of 20326431633 is 33613462302.

It is a happy number.

It is not a de Polignac number, because 20326431633 - 2⁹ = 20326431121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20326431594 and 20326431603.

It is not an unprimeable number, because it can be changed into a prime (20326431623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6426766 + ... + 6429927.

It is an arithmetic number, because the mean of its divisors is an integer number (1851363936).

Almost surely, 2^20326431633 is an apocalyptic number.

It is an amenable number.

20326431633 is a deficient number, since it is larger than the sum of its proper divisors (9295391343).

20326431633 is a wasteful number, since it uses less digits than its factorization.

20326431633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856744.

The product of its (nonzero) digits is 46656, while the sum is 33.

Adding to 20326431633 its reverse (33613462302), we get a palindrome (53939893935).

The spelling of 20326431633 in words is "twenty billion, three hundred twenty-six million, four hundred thirty-one thousand, six hundred thirty-three".