20011133232 has 120 divisors (see below), whose sum is σ = 56676952800. Its totient is φ = 6590438400.

The previous prime is 20011133231. The next prime is 20011133239. The reversal of 20011133232 is 23233111002.

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

It is not an unprimeable number, because it can be changed into a prime (20011133231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8710708 + ... + 8713004.

It is an arithmetic number, because the mean of its divisors is an integer number (472307940).

Almost surely, 2^20011133232 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 20011133232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28338476400).

20011133232 is an abundant number, since it is smaller than the sum of its proper divisors (36665819568).

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

20011133232 is a wasteful number, since it uses less digits than its factorization.

20011133232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011 (or 3002 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20011133232 its reverse (23233111002), we get a palindrome (43244244234).

The spelling of 20011133232 in words is "twenty billion, eleven million, one hundred thirty-three thousand, two hundred thirty-two".