20045312256 has 144 divisors (see below), whose sum is σ = 56971676160. Its totient is φ = 6243041280.

The previous prime is 20045312237. The next prime is 20045312263. The reversal of 20045312256 is 65221354002.

It is a super-3 number, since 3×20045312256³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675916 + ... + 704948.

It is an arithmetic number, because the mean of its divisors is an integer number (395636640).

Almost surely, 2^20045312256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20045312256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28485838080).

20045312256 is an abundant number, since it is smaller than the sum of its proper divisors (36926363904).

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

20045312256 is a wasteful number, since it uses less digits than its factorization.

20045312256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29112 (or 29098 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20045312256 its reverse (65221354002), we get a palindrome (85266666258).

The spelling of 20045312256 in words is "twenty billion, forty-five million, three hundred twelve thousand, two hundred fifty-six".