20330652521 has 4 divisors (see below), whose sum is σ = 20331053652. Its totient is φ = 20330251392.

The previous prime is 20330652487. The next prime is 20330652553. The reversal of 20330652521 is 12525603302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4739634025 + 15591018496 = 68845^2 + 124864^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330652521 - 2⁶ = 20330652457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20330652571) 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 3 ways as a sum of consecutive naturals, for example, 111296 + ... + 230321.

It is an arithmetic number, because the mean of its divisors is an integer number (5082763413).

Almost surely, 2^20330652521 is an apocalyptic number.

It is an amenable number.

20330652521 is a deficient number, since it is larger than the sum of its proper divisors (401131).

20330652521 is an equidigital number, since it uses as much as digits as its factorization.

20330652521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401130.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 20330652521 in words is "twenty billion, three hundred thirty million, six hundred fifty-two thousand, five hundred twenty-one".