20443131432 has 128 divisors (see below), whose sum is σ = 57335040000. Its totient is φ = 6748809408.

The previous prime is 20443131413. The next prime is 20443131437. The reversal of 20443131432 is 23413134402.

20443131432 is a `hidden beast` number, since 204 + 4 + 313 + 143 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20443131396 and 20443131405.

It is not an unprimeable number, because it can be changed into a prime (20443131437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21586783 + ... + 21587729.

It is an arithmetic number, because the mean of its divisors is an integer number (447930000).

Almost surely, 2^20443131432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20443131432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28667520000).

20443131432 is an abundant number, since it is smaller than the sum of its proper divisors (36891908568).

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

20443131432 is a wasteful number, since it uses less digits than its factorization.

20443131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20443131432 its reverse (23413134402), we get a palindrome (43856265834).

The spelling of 20443131432 in words is "twenty billion, four hundred forty-three million, one hundred thirty-one thousand, four hundred thirty-two".