20331321002 has 4 divisors (see below), whose sum is σ = 30496981506. Its totient is φ = 10165660500.

The previous prime is 20331320963. The next prime is 20331321007. The reversal of 20331321002 is 20012313302.

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

It can be written as a sum of positive squares in only one way, i.e., 13689234001 + 6642087001 = 117001^2 + 81499^2 .

It is a super-2 number, since 2×20331321002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20331321007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5082830249 + ... + 5082830252.

Almost surely, 2^20331321002 is an apocalyptic number.

20331321002 is a deficient number, since it is larger than the sum of its proper divisors (10165660504).

20331321002 is a wasteful number, since it uses less digits than its factorization.

20331321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10165660503.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20331321002 its reverse (20012313302), we get a palindrome (40343634304).

The spelling of 20331321002 in words is "twenty billion, three hundred thirty-one million, three hundred twenty-one thousand, two".