20873378075523 has 4 divisors (see below), whose sum is σ = 27831170767368. Its totient is φ = 13915585383680.

The previous prime is 20873378075521. The next prime is 20873378075579. The reversal of 20873378075523 is 32557087337802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20873378075523 - 2¹ = 20873378075521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20873378075521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478896345918 + ... + 3478896345923.

It is an arithmetic number, because the mean of its divisors is an integer number (6957792691842).

Almost surely, 2^{20873378075523} is an apocalyptic number.

20873378075523 is a deficient number, since it is larger than the sum of its proper divisors (6957792691845).

20873378075523 is an equidigital number, since it uses as much as digits as its factorization.

20873378075523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957792691844.

The product of its (nonzero) digits is 59270400, while the sum is 60.

The spelling of 20873378075523 in words is "twenty trillion, eight hundred seventy-three billion, three hundred seventy-eight million, seventy-five thousand, five hundred twenty-three".