20403333312 has 112 divisors (see below), whose sum is σ = 57175359360. Its totient is φ = 6403442688.

The previous prime is 20403333299. The next prime is 20403333323. The reversal of 20403333312 is 21333330402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 577468 + ... + 611780.

It is an arithmetic number, because the mean of its divisors is an integer number (510494280).

Almost surely, 2^20403333312 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 20403333312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28587679680).

20403333312 is an abundant number, since it is smaller than the sum of its proper divisors (36772026048).

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

20403333312 is a wasteful number, since it uses less digits than its factorization.

20403333312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34510 (or 34500 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 20403333312 its reverse (21333330402), we get a palindrome (41736663714).

The spelling of 20403333312 in words is "twenty billion, four hundred three million, three hundred thirty-three thousand, three hundred twelve".