20688344599 has 32 divisors (see below), whose sum is σ = 24172948800. Its totient is φ = 17530877952.

The previous prime is 20688344587. The next prime is 20688344603. The reversal of 20688344599 is 99544388602.

It is a cyclic number.

It is not a de Polignac number, because 20688344599 - 2⁷ = 20688344471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688344099) 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 31 ways as a sum of consecutive naturals, for example, 10613877 + ... + 10615825.

It is an arithmetic number, because the mean of its divisors is an integer number (755404650).

Almost surely, 2^20688344599 is an apocalyptic number.

20688344599 is a deficient number, since it is larger than the sum of its proper divisors (3484604201).

20688344599 is a wasteful number, since it uses less digits than its factorization.

20688344599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139.

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 20688344599 in words is "twenty billion, six hundred eighty-eight million, three hundred forty-four thousand, five hundred ninety-nine".