20032105021 has 8 divisors (see below), whose sum is σ = 20221286400. Its totient is φ = 19843802160.

The previous prime is 20032105019. The next prime is 20032105039. The reversal of 20032105021 is 12050123002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20032105021 - 2¹ = 20032105019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20032104986 and 20032105004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032106021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173766 + ... + 265063.

It is an arithmetic number, because the mean of its divisors is an integer number (2527660800).

Almost surely, 2^20032105021 is an apocalyptic number.

It is an amenable number.

20032105021 is a deficient number, since it is larger than the sum of its proper divisors (189181379).

20032105021 is a wasteful number, since it uses less digits than its factorization.

20032105021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439259.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 20032105021 its reverse (12050123002), we get a palindrome (32082228023).

The spelling of 20032105021 in words is "twenty billion, thirty-two million, one hundred five thousand, twenty-one".