20211235005 has 32 divisors (see below), whose sum is σ = 35000582400. Its totient is φ = 9900126720.

The previous prime is 20211235001. The next prime is 20211235007. The reversal of 20211235005 is 50053211202.

It is not a de Polignac number, because 20211235005 - 2² = 20211235001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211235001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221616 + ... + 299225.

It is an arithmetic number, because the mean of its divisors is an integer number (1093768200).

Almost surely, 2^20211235005 is an apocalyptic number.

It is an amenable number.

20211235005 is a deficient number, since it is larger than the sum of its proper divisors (14789347395).

20211235005 is a wasteful number, since it uses less digits than its factorization.

20211235005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521061.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20211235005 its reverse (50053211202), we get a palindrome (70264446207).

The spelling of 20211235005 in words is "twenty billion, two hundred eleven million, two hundred thirty-five thousand, five".