20313145219979 has 4 divisors (see below), whose sum is σ = 20696412110976. Its totient is φ = 19929878328984.

The previous prime is 20313145219973. The next prime is 20313145219987. The reversal of 20313145219979 is 97991254131302.

It is a happy number.

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 20313145219979 - 2⁴⁰ = 19213633592203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313145219973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191633445419 + ... + 191633445524.

It is an arithmetic number, because the mean of its divisors is an integer number (5174103027744).

Almost surely, 2^{20313145219979} is an apocalyptic number.

20313145219979 is a deficient number, since it is larger than the sum of its proper divisors (383266890997).

20313145219979 is an equidigital number, since it uses as much as digits as its factorization.

20313145219979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383266890996.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 20313145219979 in words is "twenty trillion, three hundred thirteen billion, one hundred forty-five million, two hundred nineteen thousand, nine hundred seventy-nine".