20879843173 has 16 divisors (see below), whose sum is σ = 25694616960. Its totient is φ = 16558742016.

The previous prime is 20879843129. The next prime is 20879843183. The reversal of 20879843173 is 37134897802.

It is not a de Polignac number, because 20879843173 - 2¹⁷ = 20879712101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20879843173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20879843183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1479936 + ... + 1493977.

It is an arithmetic number, because the mean of its divisors is an integer number (1605913560).

Almost surely, 2^20879843173 is an apocalyptic number.

It is an amenable number.

20879843173 is a deficient number, since it is larger than the sum of its proper divisors (4814773787).

20879843173 is a wasteful number, since it uses less digits than its factorization.

20879843173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973996.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 20879843173 in words is "twenty billion, eight hundred seventy-nine million, eight hundred forty-three thousand, one hundred seventy-three".