20345868635 has 8 divisors (see below), whose sum is σ = 24643220976. Its totient is φ = 16124575840.

The previous prime is 20345868607. The next prime is 20345868649. The reversal of 20345868635 is 53686854302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20345868635 - 2¹⁰ = 20345867611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19014296 + ... + 19015365.

It is an arithmetic number, because the mean of its divisors is an integer number (3080402622).

Almost surely, 2^20345868635 is an apocalyptic number.

20345868635 is a deficient number, since it is larger than the sum of its proper divisors (4297352341).

20345868635 is a wasteful number, since it uses less digits than its factorization.

20345868635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38029773.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 20345868635 in words is "twenty billion, three hundred forty-five million, eight hundred sixty-eight thousand, six hundred thirty-five".