20161450321 has 4 divisors (see below), whose sum is σ = 20161852144. Its totient is φ = 20161048500.

The previous prime is 20161450313. The next prime is 20161450333. The reversal of 20161450321 is 12305416102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20161450321 - 2³ = 20161450313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20161450391) 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, 112755 + ... + 230296.

It is an arithmetic number, because the mean of its divisors is an integer number (5040463036).

Almost surely, 2^20161450321 is an apocalyptic number.

It is an amenable number.

20161450321 is a deficient number, since it is larger than the sum of its proper divisors (401823).

20161450321 is an equidigital number, since it uses as much as digits as its factorization.

20161450321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401822.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 20161450321 its reverse (12305416102), we get a palindrome (32466866423).

The spelling of 20161450321 in words is "twenty billion, one hundred sixty-one million, four hundred fifty thousand, three hundred twenty-one".