20855439595 has 8 divisors (see below), whose sum is σ = 25027716960. Its totient is φ = 16683558720.

The previous prime is 20855439587. The next prime is 20855439607. The reversal of 20855439595 is 59593455802.

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

It is not a de Polignac number, because 20855439595 - 2³ = 20855439587 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32490 + ... + 206800.

It is an arithmetic number, because the mean of its divisors is an integer number (3128464620).

Almost surely, 2^20855439595 is an apocalyptic number.

20855439595 is a deficient number, since it is larger than the sum of its proper divisors (4172277365).

20855439595 is a wasteful number, since it uses less digits than its factorization.

20855439595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198245.

The product of its (nonzero) digits is 9720000, while the sum is 55.

The spelling of 20855439595 in words is "twenty billion, eight hundred fifty-five million, four hundred thirty-nine thousand, five hundred ninety-five".