20217564133 has 24 divisors (see below), whose sum is σ = 22396248576. Its totient is φ = 18234216000.

The previous prime is 20217564089. The next prime is 20217564149. The reversal of 20217564133 is 33146571202.

It is not a de Polignac number, because 20217564133 - 2²⁵ = 20184009701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217514133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5566228 + ... + 5569858.

It is an arithmetic number, because the mean of its divisors is an integer number (933177024).

Almost surely, 2^20217564133 is an apocalyptic number.

It is an amenable number.

20217564133 is a deficient number, since it is larger than the sum of its proper divisors (2178684443).

20217564133 is a wasteful number, since it uses less digits than its factorization.

20217564133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405 (or 4392 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20217564133 in words is "twenty billion, two hundred seventeen million, five hundred sixty-four thousand, one hundred thirty-three".