20487679807 has 16 divisors (see below), whose sum is σ = 24684060672. Its totient is φ = 16632797760.

The previous prime is 20487679799. The next prime is 20487679837. The reversal of 20487679807 is 70897678402.

It is a cyclic number.

It is not a de Polignac number, because 20487679807 - 2³ = 20487679799 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 (20487679837) 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 15 ways as a sum of consecutive naturals, for example, 994198 + ... + 1014595.

It is an arithmetic number, because the mean of its divisors is an integer number (1542753792).

Almost surely, 2^20487679807 is an apocalyptic number.

20487679807 is a deficient number, since it is larger than the sum of its proper divisors (4196380865).

20487679807 is a wasteful number, since it uses less digits than its factorization.

20487679807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008878.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 20487679807 in words is "twenty billion, four hundred eighty-seven million, six hundred seventy-nine thousand, eight hundred seven".