20879199815168 has 40 divisors (see below), whose sum is σ = 41753865795840. Its totient is φ = 10430529587200.

The previous prime is 20879199815161. The next prime is 20879199815249. The reversal of 20879199815168 is 86151899197802.

It is a super-2 number, since 2×20879199815168² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20879199815095 and 20879199815104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20879199815161) 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, 17125583 + ... + 18304206.

It is an arithmetic number, because the mean of its divisors is an integer number (1043846644896).

Almost surely, 2^{20879199815168} is an apocalyptic number.

It is an amenable number.

20879199815168 is a deficient number, since it is larger than the sum of its proper divisors (20874665980672).

20879199815168 is an equidigital number, since it uses as much as digits as its factorization.

20879199815168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35430958 (or 35430942 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 74.

The spelling of 20879199815168 in words is "twenty trillion, eight hundred seventy-nine billion, one hundred ninety-nine million, eight hundred fifteen thousand, one hundred sixty-eight".