20533017330 has 144 divisors (see below), whose sum is σ = 62953599384. Its totient is φ = 4628897280.

The previous prime is 20533017293. The next prime is 20533017331. The reversal of 20533017330 is 3371033502.

20533017330 is a `hidden beast` number, since 20 + 5 + 3 + 301 + 7 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17078046489 + 3454970841 = 130683^2 + 58779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20533017294 and 20533017303.

It is not an unprimeable number, because it can be changed into a prime (20533017331) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 290040 + ... + 353820.

Almost surely, 2^20533017330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20533017330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31476799692).

20533017330 is an abundant number, since it is smaller than the sum of its proper divisors (42420582054).

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

20533017330 is a wasteful number, since it uses less digits than its factorization.

20533017330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63881 (or 63871 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 27.

The spelling of 20533017330 in words is "twenty billion, five hundred thirty-three million, seventeen thousand, three hundred thirty".