15516320023 has 2 divisors, whose sum is σ = 15516320024. Its totient is φ = 15516320022.

The previous prime is 15516319997. The next prime is 15516320041. The reversal of 15516320023 is 32002361551.

It is a strong prime.

It is an emirp because it is prime and its reverse (32002361551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15516320023 - 2⁵ = 15516319991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15516319973 and 15516320000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15516320063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7758160011 + 7758160012.

It is an arithmetic number, because the mean of its divisors is an integer number (7758160012).

Almost surely, 2^15516320023 is an apocalyptic number.

15516320023 is a deficient number, since it is larger than the sum of its proper divisors (1).

15516320023 is an equidigital number, since it uses as much as digits as its factorization.

15516320023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 15516320023 its reverse (32002361551), we get a palindrome (47518681574).

The spelling of 15516320023 in words is "fifteen billion, five hundred sixteen million, three hundred twenty thousand, twenty-three".