20331433044 has 36 divisors (see below), whose sum is σ = 55346680116. Its totient is φ = 6255825408.

The previous prime is 20331433009. The next prime is 20331433063. The reversal of 20331433044 is 44033413302.

20331433044 is a `hidden beast` number, since 20 + 331 + 4 + 3 + 304 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7702168644 + 12629264400 = 87762^2 + 112380^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 20331432999 and 20331433017.

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 11 ways as a sum of consecutive naturals, for example, 21721149 + ... + 21722084.

It is an arithmetic number, because the mean of its divisors is an integer number (1537407781).

Almost surely, 2^20331433044 is an apocalyptic number.

It is an amenable number.

20331433044 is an abundant number, since it is smaller than the sum of its proper divisors (35015247072).

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

20331433044 is a wasteful number, since it uses less digits than its factorization.

20331433044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43443256 (or 43443251 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 20331433044 its reverse (44033413302), we get a palindrome (64364846346).

The spelling of 20331433044 in words is "twenty billion, three hundred thirty-one million, four hundred thirty-three thousand, forty-four".