20801679411 has 4 divisors (see below), whose sum is σ = 27735572552. Its totient is φ = 13867786272.

The previous prime is 20801679403. The next prime is 20801679469. The reversal of 20801679411 is 11497610802.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20801679411 - 2³ = 20801679403 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 20801679411.

It is not an unprimeable number, because it can be changed into a prime (20801679491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466946566 + ... + 3466946571.

It is an arithmetic number, because the mean of its divisors is an integer number (6933893138).

Almost surely, 2^20801679411 is an apocalyptic number.

20801679411 is a deficient number, since it is larger than the sum of its proper divisors (6933893141).

20801679411 is an equidigital number, since it uses as much as digits as its factorization.

20801679411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933893140.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 20801679411 in words is "twenty billion, eight hundred one million, six hundred seventy-nine thousand, four hundred eleven".