20501045312 has 56 divisors (see below), whose sum is σ = 44674243392. Its totient is φ = 9256896000.

The previous prime is 20501045311. The next prime is 20501045321. The reversal of 20501045312 is 21354010502.

It is not an unprimeable number, because it can be changed into a prime (20501045311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9878 + ... + 202730.

Almost surely, 2^20501045312 is an apocalyptic number.

20501045312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20501045312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22337121696).

20501045312 is an abundant number, since it is smaller than the sum of its proper divisors (24173198080).

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

20501045312 is a wasteful number, since it uses less digits than its factorization.

20501045312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193027 (or 193017 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20501045312 its reverse (21354010502), we get a palindrome (41855055814).

The spelling of 20501045312 in words is "twenty billion, five hundred one million, forty-five thousand, three hundred twelve".