20032444021 has 32 divisors (see below), whose sum is σ = 22309032960. Its totient is φ = 17902596096.

The previous prime is 20032443971. The next prime is 20032444027. The reversal of 20032444021 is 12044423002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20032444021 - 2²³ = 20024055413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20032443983 and 20032444001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032444027) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12016230 + ... + 12017896.

It is an arithmetic number, because the mean of its divisors is an integer number (697157280).

Almost surely, 2^20032444021 is an apocalyptic number.

It is an amenable number.

20032444021 is a deficient number, since it is larger than the sum of its proper divisors (2276588939).

20032444021 is a wasteful number, since it uses less digits than its factorization.

20032444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20032444021 its reverse (12044423002), we get a palindrome (32076867023).

The spelling of 20032444021 in words is "twenty billion, thirty-two million, four hundred forty-four thousand, twenty-one".