20979229343 has 4 divisors (see below), whose sum is σ = 20980066800. Its totient is φ = 20978391888.

The previous prime is 20979229303. The next prime is 20979229351. The reversal of 20979229343 is 34392297902.

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 20979229343 - 2⁸ = 20979229087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20979229291 and 20979229300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20979229303) 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, 379955 + ... + 431652.

It is an arithmetic number, because the mean of its divisors is an integer number (5245016700).

Almost surely, 2^20979229343 is an apocalyptic number.

20979229343 is a deficient number, since it is larger than the sum of its proper divisors (837457).

20979229343 is an equidigital number, since it uses as much as digits as its factorization.

20979229343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837456.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 20979229343 in words is "twenty billion, nine hundred seventy-nine million, two hundred twenty-nine thousand, three hundred forty-three".