20321001033 has 4 divisors (see below), whose sum is σ = 27094668048. Its totient is φ = 13547334020.

The previous prime is 20321000923. The next prime is 20321001059. The reversal of 20321001033 is 33010012302.

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 20321001033 - 2⁹ = 20321000521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321001083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386833503 + ... + 3386833508.

It is an arithmetic number, because the mean of its divisors is an integer number (6773667012).

Almost surely, 2^20321001033 is an apocalyptic number.

It is an amenable number.

20321001033 is a deficient number, since it is larger than the sum of its proper divisors (6773667015).

20321001033 is an equidigital number, since it uses as much as digits as its factorization.

20321001033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6773667014.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20321001033 its reverse (33010012302), we get a palindrome (53331013335).

The spelling of 20321001033 in words is "twenty billion, three hundred twenty-one million, one thousand, thirty-three".