20533303332 has 60 divisors (see below), whose sum is σ = 53805969756. Its totient is φ = 6828131520.

The previous prime is 20533303331. The next prime is 20533303367. The reversal of 20533303332 is 23330333502.

20533303332 is a `hidden beast` number, since 20 + 5 + 3 + 3 + 303 + 332 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7706381796 + 12826921536 = 87786^2 + 113256^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20533303296 and 20533303305.

It is not an unprimeable number, because it can be changed into a prime (20533303331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61138 + ... + 211670.

Almost surely, 2^20533303332 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 20533303332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26902984878).

20533303332 is an abundant number, since it is smaller than the sum of its proper divisors (33272666424).

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

20533303332 is a wasteful number, since it uses less digits than its factorization.

20533303332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150970 (or 150959 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 27.

Adding to 20533303332 its reverse (23330333502), we get a palindrome (43863636834).

The spelling of 20533303332 in words is "twenty billion, five hundred thirty-three million, three hundred three thousand, three hundred thirty-two".