20321331066446 has 16 divisors (see below), whose sum is σ = 31307101386864. Its totient is φ = 9885652833024.

The previous prime is 20321331066433. The next prime is 20321331066473. The reversal of 20321331066446 is 64466013312302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3712355 + ... + 7377278.

It is an arithmetic number, because the mean of its divisors is an integer number (1956693836679).

Almost surely, 2^{20321331066446} is an apocalyptic number.

20321331066446 is a deficient number, since it is larger than the sum of its proper divisors (10985770320418).

20321331066446 is a wasteful number, since it uses less digits than its factorization.

20321331066446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11114435.

The product of its (nonzero) digits is 373248, while the sum is 41.

Adding to 20321331066446 its reverse (64466013312302), we get a palindrome (84787344378748).

The spelling of 20321331066446 in words is "twenty trillion, three hundred twenty-one billion, three hundred thirty-one million, sixty-six thousand, four hundred forty-six".