20444604666426 has 56 divisors (see below), whose sum is σ = 47978428206240. Its totient is φ = 6518569593096.

The previous prime is 20444604666407. The next prime is 20444604666439. The reversal of 20444604666426 is 62466640644402.

It is a super-2 number, since 2×20444604666426² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 304800436 + ... + 304867503.

It is an arithmetic number, because the mean of its divisors is an integer number (856757646540).

Almost surely, 2^{20444604666426} is an apocalyptic number.

20444604666426 is an abundant number, since it is smaller than the sum of its proper divisors (27533823539814).

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

20444604666426 is an equidigital number, since it uses as much as digits as its factorization.

20444604666426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609667982 (or 609667967 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 54.

The spelling of 20444604666426 in words is "twenty trillion, four hundred forty-four billion, six hundred four million, six hundred sixty-six thousand, four hundred twenty-six".