20634384468886 has 4 divisors (see below), whose sum is σ = 30951576703332. Its totient is φ = 10317192234442.

The previous prime is 20634384468877. The next prime is 20634384468889. The reversal of 20634384468886 is 68886448343602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634384468889) 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 as a sum of consecutive naturals, namely, 5158596117220 + ... + 5158596117223.

It is an arithmetic number, because the mean of its divisors is an integer number (7737894175833).

Almost surely, 2^{20634384468886} is an apocalyptic number.

20634384468886 is a deficient number, since it is larger than the sum of its proper divisors (10317192234446).

20634384468886 is a wasteful number, since it uses less digits than its factorization.

20634384468886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10317192234445.

The product of its (nonzero) digits is 1019215872, while the sum is 70.

The spelling of 20634384468886 in words is "twenty trillion, six hundred thirty-four billion, three hundred eighty-four million, four hundred sixty-eight thousand, eight hundred eighty-six".