20111202324 has 72 divisors (see below), whose sum is σ = 51741144000. Its totient is φ = 6584649984.

The previous prime is 20111202311. The next prime is 20111202329. The reversal of 20111202324 is 42320211102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20111202297 and 20111202306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111202329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3159457 + ... + 3165815.

It is an arithmetic number, because the mean of its divisors is an integer number (718627000).

Almost surely, 2^20111202324 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 20111202324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25870572000).

20111202324 is an abundant number, since it is smaller than the sum of its proper divisors (31629941676).

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

20111202324 is a wasteful number, since it uses less digits than its factorization.

20111202324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917 (or 7912 counting only the distinct ones).

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

Adding to 20111202324 its reverse (42320211102), we get a palindrome (62431413426).

The spelling of 20111202324 in words is "twenty billion, one hundred eleven million, two hundred two thousand, three hundred twenty-four".