20213240112 has 120 divisors (see below), whose sum is σ = 61919505648. Its totient is φ = 6117465600.

The previous prime is 20213240101. The next prime is 20213240123. The reversal of 20213240112 is 21104231202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20213240101) and next prime (20213240123).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25687 + ... + 202697.

Almost surely, 2^20213240112 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 20213240112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30959752824).

20213240112 is an abundant number, since it is smaller than the sum of its proper divisors (41706265536).

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

20213240112 is a wasteful number, since it uses less digits than its factorization.

20213240112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177099 (or 177090 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20213240112 its reverse (21104231202), we get a palindrome (41317471314).

The spelling of 20213240112 in words is "twenty billion, two hundred thirteen million, two hundred forty thousand, one hundred twelve".