20236930657 has 8 divisors (see below), whose sum is σ = 20287483776. Its totient is φ = 20186442192.

The previous prime is 20236930639. The next prime is 20236930661. The reversal of 20236930657 is 75603963202.

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 20236930657 - 2¹⁹ = 20236406369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20236930667) by changing a digit.

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, 643768 + ... + 674470.

It is an arithmetic number, because the mean of its divisors is an integer number (2535935472).

Almost surely, 2^20236930657 is an apocalyptic number.

It is an amenable number.

20236930657 is a deficient number, since it is larger than the sum of its proper divisors (50553119).

20236930657 is an equidigital number, since it uses as much as digits as its factorization.

20236930657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32327.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 20236930657 in words is "twenty billion, two hundred thirty-six million, nine hundred thirty thousand, six hundred fifty-seven".