20140350521 has 4 divisors (see below), whose sum is σ = 20146054692. Its totient is φ = 20134646352.

The previous prime is 20140350509. The next prime is 20140350523. The reversal of 20140350521 is 12505304102.

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 8478726400 + 11661624121 = 92080^2 + 107989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20140350521 - 2⁶ = 20140350457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20140350523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2846786 + ... + 2853851.

It is an arithmetic number, because the mean of its divisors is an integer number (5036513673).

Almost surely, 2^20140350521 is an apocalyptic number.

It is an amenable number.

20140350521 is a deficient number, since it is larger than the sum of its proper divisors (5704171).

20140350521 is an equidigital number, since it uses as much as digits as its factorization.

20140350521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704170.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20140350521 its reverse (12505304102), we get a palindrome (32645654623).

The spelling of 20140350521 in words is "twenty billion, one hundred forty million, three hundred fifty thousand, five hundred twenty-one".