20879327971 has 8 divisors (see below), whose sum is σ = 22212302544. Its totient is φ = 19557995520.

The previous prime is 20879327969. The next prime is 20879327977. The reversal of 20879327971 is 17972397802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20879327971 - 2¹ = 20879327969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20879327977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2906830 + ... + 2914003.

It is an arithmetic number, because the mean of its divisors is an integer number (2776537818).

Almost surely, 2^20879327971 is an apocalyptic number.

20879327971 is a deficient number, since it is larger than the sum of its proper divisors (1332974573).

20879327971 is a wasteful number, since it uses less digits than its factorization.

20879327971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821061.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The spelling of 20879327971 in words is "twenty billion, eight hundred seventy-nine million, three hundred twenty-seven thousand, nine hundred seventy-one".