20644644602 has 8 divisors (see below), whose sum is σ = 31687129056. Its totient is φ = 10082268252.

The previous prime is 20644644577. The next prime is 20644644607.

20644644602 is nontrivially palindromic in base 10.

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

It is not an unprimeable number, because it can be changed into a prime (20644644607) 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 3 ways as a sum of consecutive naturals, for example, 120026918 + ... + 120027089.

It is an arithmetic number, because the mean of its divisors is an integer number (3960891132).

Almost surely, 2^20644644602 is an apocalyptic number.

20644644602 is a deficient number, since it is larger than the sum of its proper divisors (11042484454).

20644644602 is a wasteful number, since it uses less digits than its factorization.

20644644602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240054052.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20644644602 in words is "twenty billion, six hundred forty-four million, six hundred forty-four thousand, six hundred two".