20445660312 has 64 divisors (see below), whose sum is σ = 63726739200. Its totient is φ = 5310560640.

The previous prime is 20445660293. The next prime is 20445660329. The reversal of 20445660312 is 21306654402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5529987 + ... + 5533682.

It is an arithmetic number, because the mean of its divisors is an integer number (995730300).

Almost surely, 2^20445660312 is an apocalyptic number.

20445660312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20445660312 is an abundant number, since it is smaller than the sum of its proper divisors (43281078888).

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

20445660312 is a wasteful number, since it uses less digits than its factorization.

20445660312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063696 (or 11063692 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20445660312 in words is "twenty billion, four hundred forty-five million, six hundred sixty thousand, three hundred twelve".