20144021711 has 16 divisors (see below), whose sum is σ = 23147804160. Its totient is φ = 17336983680.

The previous prime is 20144021683. The next prime is 20144021741. The reversal of 20144021711 is 11712044102.

It is a cyclic number.

It is not a de Polignac number, because 20144021711 - 2⁶ = 20144021647 is a prime.

It is a super-2 number, since 2×20144021711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144021741) 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 15 ways as a sum of consecutive naturals, for example, 278375 + ... + 343191.

It is an arithmetic number, because the mean of its divisors is an integer number (1446737760).

Almost surely, 2^20144021711 is an apocalyptic number.

20144021711 is a deficient number, since it is larger than the sum of its proper divisors (3003782449).

20144021711 is a wasteful number, since it uses less digits than its factorization.

20144021711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66334.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 20144021711 its reverse (11712044102), we get a palindrome (31856065813).

The spelling of 20144021711 in words is "twenty billion, one hundred forty-four million, twenty-one thousand, seven hundred eleven".