20314689779 has 4 divisors (see below), whose sum is σ = 20315387400. Its totient is φ = 20313992160.

The previous prime is 20314689757. The next prime is 20314689803. The reversal of 20314689779 is 97798641302.

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 20314689779 - 2²⁰ = 20313641203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20314689739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303137 + ... + 364034.

It is an arithmetic number, because the mean of its divisors is an integer number (5078846850).

Almost surely, 2^20314689779 is an apocalyptic number.

20314689779 is a deficient number, since it is larger than the sum of its proper divisors (697621).

20314689779 is an equidigital number, since it uses as much as digits as its factorization.

20314689779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697620.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 20314689779 in words is "twenty billion, three hundred fourteen million, six hundred eighty-nine thousand, seven hundred seventy-nine".