20687365359 has 16 divisors (see below), whose sum is σ = 30650197600. Its totient is φ = 13790564928.

The previous prime is 20687365339. The next prime is 20687365411. The reversal of 20687365359 is 95356378602.

It is a happy number.

20687365359 is a `hidden beast` number, since 20 + 6 + 87 + 3 + 6 + 535 + 9 = 666.

It is not a de Polignac number, because 20687365359 - 2⁹ = 20687364847 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 (20687365339) 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, 610137 + ... + 643149.

It is an arithmetic number, because the mean of its divisors is an integer number (1915637350).

Almost surely, 2^20687365359 is an apocalyptic number.

20687365359 is a deficient number, since it is larger than the sum of its proper divisors (9962832241).

20687365359 is a wasteful number, since it uses less digits than its factorization.

20687365359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56231 (or 56225 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 20687365359 in words is "twenty billion, six hundred eighty-seven million, three hundred sixty-five thousand, three hundred fifty-nine".