20144041021 has 12 divisors (see below), whose sum is σ = 21823631328. Its totient is φ = 18585247824.

The previous prime is 20144041009. The next prime is 20144041069. The reversal of 20144041021 is 12014044102.

It is not a de Polignac number, because 20144041021 - 2⁹ = 20144040509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20144041021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144048021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323416 + ... + 380638.

It is an arithmetic number, because the mean of its divisors is an integer number (1818635944).

Almost surely, 2^20144041021 is an apocalyptic number.

It is an amenable number.

20144041021 is a deficient number, since it is larger than the sum of its proper divisors (1679590307).

20144041021 is a wasteful number, since it uses less digits than its factorization.

20144041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59332 (or 59319 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20144041021 its reverse (12014044102), we get a palindrome (32158085123).

The spelling of 20144041021 in words is "twenty billion, one hundred forty-four million, forty-one thousand, twenty-one".