20045544312 has 128 divisors (see below), whose sum is σ = 53555040000. Its totient is φ = 6234402816.

The previous prime is 20045544289. The next prime is 20045544319. The reversal of 20045544312 is 21344554002.

It is a super-3 number, since 3×20045544312³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20045544312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045544319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10128139 + ... + 10130117.

It is an arithmetic number, because the mean of its divisors is an integer number (418398750).

Almost surely, 2^20045544312 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 20045544312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26777520000).

20045544312 is an abundant number, since it is smaller than the sum of its proper divisors (33509495688).

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

20045544312 is a wasteful number, since it uses less digits than its factorization.

20045544312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333 (or 2329 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 20045544312 in words is "twenty billion, forty-five million, five hundred forty-four thousand, three hundred twelve".