20320643123416 has 8 divisors (see below), whose sum is σ = 38101205856420. Its totient is φ = 10160321561704.

The previous prime is 20320643123377. The next prime is 20320643123461. The reversal of 20320643123416 is 61432134602302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270040195206 + ... + 1270040195221.

Almost surely, 2^{20320643123416} is an apocalyptic number.

It is an amenable number.

20320643123416 is a deficient number, since it is larger than the sum of its proper divisors (17780562733004).

20320643123416 is a wasteful number, since it uses less digits than its factorization.

20320643123416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540080390433 (or 2540080390429 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 20320643123416 its reverse (61432134602302), we get a palindrome (81752777725718).

The spelling of 20320643123416 in words is "twenty trillion, three hundred twenty billion, six hundred forty-three million, one hundred twenty-three thousand, four hundred sixteen".