20321321001 has 4 divisors (see below), whose sum is σ = 27095094672. Its totient is φ = 13547547332.

The previous prime is 20321320993. The next prime is 20321321017. The reversal of 20321321001 is 10012312302.

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 20321321001 - 2³ = 20321320993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321321021) 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, 3386886831 + ... + 3386886836.

It is an arithmetic number, because the mean of its divisors is an integer number (6773773668).

Almost surely, 2^20321321001 is an apocalyptic number.

It is an amenable number.

20321321001 is a deficient number, since it is larger than the sum of its proper divisors (6773773671).

20321321001 is an equidigital number, since it uses as much as digits as its factorization.

20321321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773773670.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20321321001 its reverse (10012312302), we get a palindrome (30333633303).

The spelling of 20321321001 in words is "twenty billion, three hundred twenty-one million, three hundred twenty-one thousand, one".