20212423112 has 64 divisors (see below), whose sum is σ = 43944768000. Its totient is φ = 8536743936.

The previous prime is 20212423109. The next prime is 20212423141. The reversal of 20212423112 is 21132421202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290464 + ... + 1306032.

It is an arithmetic number, because the mean of its divisors is an integer number (686637000).

Almost surely, 2^20212423112 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 20212423112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21972384000).

20212423112 is an abundant number, since it is smaller than the sum of its proper divisors (23732344888).

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

20212423112 is a wasteful number, since it uses less digits than its factorization.

20212423112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15918 (or 15914 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20212423112 its reverse (21132421202), we get a palindrome (41344844314).

The spelling of 20212423112 in words is "twenty billion, two hundred twelve million, four hundred twenty-three thousand, one hundred twelve".