20887486679 has 16 divisors (see below), whose sum is σ = 22832948736. Its totient is φ = 19027238400.

The previous prime is 20887486661. The next prime is 20887486687. The reversal of 20887486679 is 97668478802.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20887486679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887486649) 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, 33209 + ... + 207069.

It is an arithmetic number, because the mean of its divisors is an integer number (1427059296).

Almost surely, 2^20887486679 is an apocalyptic number.

20887486679 is a deficient number, since it is larger than the sum of its proper divisors (1945462057).

20887486679 is a wasteful number, since it uses less digits than its factorization.

20887486679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174106.

The product of its (nonzero) digits is 65028096, while the sum is 65.

The spelling of 20887486679 in words is "twenty billion, eight hundred eighty-seven million, four hundred eighty-six thousand, six hundred seventy-nine".