20335116021 has 16 divisors (see below), whose sum is σ = 30207679488. Its totient is φ = 12062092400.

The previous prime is 20335116007. The next prime is 20335116091. The reversal of 20335116021 is 12061153302.

It is a cyclic number.

It is not a de Polignac number, because 20335116021 - 2⁵ = 20335115989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20335115982 and 20335116000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20335116001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6553935 + ... + 6557036.

It is an arithmetic number, because the mean of its divisors is an integer number (1887979968).

Almost surely, 2^20335116021 is an apocalyptic number.

It is an amenable number.

20335116021 is a deficient number, since it is larger than the sum of its proper divisors (9872563467).

20335116021 is a wasteful number, since it uses less digits than its factorization.

20335116021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13111032.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 20335116021 its reverse (12061153302), we get a palindrome (32396269323).

The spelling of 20335116021 in words is "twenty billion, three hundred thirty-five million, one hundred sixteen thousand, twenty-one".