20012011312 has 80 divisors (see below), whose sum is σ = 43012104192. Its totient is φ = 8977351680.

The previous prime is 20012011309. The next prime is 20012011319. The reversal of 20012011312 is 21311021002.

It is a super-2 number, since 2×20012011312² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20012011292 and 20012011301.

It is not an unprimeable number, because it can be changed into a prime (20012011319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547233 + ... + 582655.

Almost surely, 2^20012011312 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 20012011312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21506052096).

20012011312 is an abundant number, since it is smaller than the sum of its proper divisors (23000092880).

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

20012011312 is a wasteful number, since it uses less digits than its factorization.

20012011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35546 (or 35540 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20012011312 its reverse (21311021002), we get a palindrome (41323032314).

The spelling of 20012011312 in words is "twenty billion, twelve million, eleven thousand, three hundred twelve".