20071272012 has 96 divisors (see below), whose sum is σ = 53597376000. Its totient is φ = 5789683200.

The previous prime is 20071271993. The next prime is 20071272019. The reversal of 20071272012 is 21027217002.

It is not an unprimeable number, because it can be changed into a prime (20071272019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234864 + ... + 308712.

It is an arithmetic number, because the mean of its divisors is an integer number (558306000).

Almost surely, 2^20071272012 is an apocalyptic number.

20071272012 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 20071272012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26798688000).

20071272012 is an abundant number, since it is smaller than the sum of its proper divisors (33526103988).

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

20071272012 is a wasteful number, since it uses less digits than its factorization.

20071272012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73967 (or 73965 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

Adding to 20071272012 its reverse (21027217002), we get a palindrome (41098489014).

The spelling of 20071272012 in words is "twenty billion, seventy-one million, two hundred seventy-two thousand, twelve".