20321111416 has 8 divisors (see below), whose sum is σ = 38102083920. Its totient is φ = 10160555704.

The previous prime is 20321111407. The next prime is 20321111417. The reversal of 20321111416 is 61411112302.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321111417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270069456 + ... + 1270069471.

It is an arithmetic number, because the mean of its divisors is an integer number (4762760490).

Almost surely, 2^20321111416 is an apocalyptic number.

It is an amenable number.

20321111416 is a deficient number, since it is larger than the sum of its proper divisors (17780972504).

20321111416 is a wasteful number, since it uses less digits than its factorization.

20321111416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540138933 (or 2540138929 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20321111416 its reverse (61411112302), we get a palindrome (81732223718).

The spelling of 20321111416 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, four hundred sixteen".