20355316230666 has 8 divisors (see below), whose sum is σ = 40710632461344. Its totient is φ = 6785105410220.

The previous prime is 20355316230649. The next prime is 20355316230673. The reversal of 20355316230666 is 66603261355302.

It is a happy number.

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

20355316230666 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 1696276352550 + ... + 1696276352561.

It is an arithmetic number, because the mean of its divisors is an integer number (5088829057668).

Almost surely, 2^{20355316230666} is an apocalyptic number.

20355316230666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20355316230666 is a wasteful number, since it uses less digits than its factorization.

20355316230666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392552705116.

The product of its (nonzero) digits is 3499200, while the sum is 48.

Adding to 20355316230666 its reverse (66603261355302), we get a palindrome (86958577585968).

The spelling of 20355316230666 in words is "twenty trillion, three hundred fifty-five billion, three hundred sixteen million, two hundred thirty thousand, six hundred sixty-six".