20010081668626 has 32 divisors (see below), whose sum is σ = 34461227399040. Its totient is φ = 8536281532800.

The previous prime is 20010081668623. The next prime is 20010081668641. The reversal of 20010081668626 is 62686618001002.

It is not an unprimeable number, because it can be changed into a prime (20010081668623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1067635 + ... + 6415606.

It is an arithmetic number, because the mean of its divisors is an integer number (1076913356220).

Almost surely, 2^{20010081668626} is an apocalyptic number.

20010081668626 is a deficient number, since it is larger than the sum of its proper divisors (14451145730414).

20010081668626 is a wasteful number, since it uses less digits than its factorization.

20010081668626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7484130.

The product of its (nonzero) digits is 331776, while the sum is 46.

Adding to 20010081668626 its reverse (62686618001002), we get a palindrome (82696699669628).

The spelling of 20010081668626 in words is "twenty trillion, ten billion, eighty-one million, six hundred sixty-eight thousand, six hundred twenty-six".