20636650241 has 8 divisors (see below), whose sum is σ = 21380673600. Its totient is φ = 19894787920.

The previous prime is 20636650219. The next prime is 20636650261. The reversal of 20636650241 is 14205663602.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20636650241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20636650261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520805 + ... + 559026.

It is an arithmetic number, because the mean of its divisors is an integer number (2672584200).

Almost surely, 2^20636650241 is an apocalyptic number.

It is an amenable number.

20636650241 is a deficient number, since it is larger than the sum of its proper divisors (744023359).

20636650241 is a wasteful number, since it uses less digits than its factorization.

20636650241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080519.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 20636650241 in words is "twenty billion, six hundred thirty-six million, six hundred fifty thousand, two hundred forty-one".