20979229295 has 16 divisors (see below), whose sum is σ = 25762160160. Its totient is φ = 16394761344.

The previous prime is 20979229291. The next prime is 20979229303. The reversal of 20979229295 is 59292297902.

It is a cyclic number.

It is not a de Polignac number, because 20979229295 - 2² = 20979229291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20979229295.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20979229291) 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 15 ways as a sum of consecutive naturals, for example, 112169 + ... + 233538.

It is an arithmetic number, because the mean of its divisors is an integer number (1610135010).

Almost surely, 2^20979229295 is an apocalyptic number.

20979229295 is a deficient number, since it is larger than the sum of its proper divisors (4782930865).

20979229295 is a wasteful number, since it uses less digits than its factorization.

20979229295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345994.

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

The spelling of 20979229295 in words is "twenty billion, nine hundred seventy-nine million, two hundred twenty-nine thousand, two hundred ninety-five".