20321111232 has 84 divisors (see below), whose sum is σ = 58350104280. Its totient is φ = 6761690112.

The previous prime is 20321111203. The next prime is 20321111281. The reversal of 20321111232 is 23211112302.

20321111232 is a `hidden beast` number, since 2 + 0 + 321 + 111 + 232 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296743 + ... + 358745.

Almost surely, 2^20321111232 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 20321111232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29175052140).

20321111232 is an abundant number, since it is smaller than the sum of its proper divisors (38028993048).

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

20321111232 is a wasteful number, since it uses less digits than its factorization.

20321111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62590 (or 62577 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20321111232 its reverse (23211112302), we get a palindrome (43532223534).

The spelling of 20321111232 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, two hundred thirty-two".