20636720285 has 8 divisors (see below), whose sum is σ = 25290959616. Its totient is φ = 16158112720.

The previous prime is 20636720239. The next prime is 20636720323. The reversal of 20636720285 is 58202763602.

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

It is not a de Polignac number, because 20636720285 - 2⁸ = 20636720029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43907681 + ... + 43908150.

It is an arithmetic number, because the mean of its divisors is an integer number (3161369952).

Almost surely, 2^20636720285 is an apocalyptic number.

It is an amenable number.

20636720285 is a deficient number, since it is larger than the sum of its proper divisors (4654239331).

20636720285 is an equidigital number, since it uses as much as digits as its factorization.

20636720285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87815883.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 20636720285 in words is "twenty billion, six hundred thirty-six million, seven hundred twenty thousand, two hundred eighty-five".