20547835705 has 8 divisors (see below), whose sum is σ = 25025424192. Its totient is φ = 16192921008.

The previous prime is 20547835699. The next prime is 20547835717. The reversal of 20547835705 is 50753874502.

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

It is a cyclic number.

It is not a de Polignac number, because 20547835705 - 2⁹ = 20547835193 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, 30668077 + ... + 30668746.

It is an arithmetic number, because the mean of its divisors is an integer number (3128178024).

Almost surely, 2^20547835705 is an apocalyptic number.

It is an amenable number.

20547835705 is a deficient number, since it is larger than the sum of its proper divisors (4477588487).

20547835705 is an equidigital number, since it uses as much as digits as its factorization.

20547835705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61336895.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The spelling of 20547835705 in words is "twenty billion, five hundred forty-seven million, eight hundred thirty-five thousand, seven hundred five".