20210021441 has 16 divisors (see below), whose sum is σ = 21402235200. Its totient is φ = 19030837248.

The previous prime is 20210021423. The next prime is 20210021443. The reversal of 20210021441 is 14412001202.

It is a cyclic number.

It is not a de Polignac number, because 20210021441 - 2¹⁰ = 20210020417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210021443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7835090 + ... + 7837668.

It is an arithmetic number, because the mean of its divisors is an integer number (1337639700).

Almost surely, 2^20210021441 is an apocalyptic number.

It is an amenable number.

20210021441 is a deficient number, since it is larger than the sum of its proper divisors (1192213759).

20210021441 is a wasteful number, since it uses less digits than its factorization.

20210021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20210021441 its reverse (14412001202), we get a palindrome (34622022643).

The spelling of 20210021441 in words is "twenty billion, two hundred ten million, twenty-one thousand, four hundred forty-one".