20132102321 has 4 divisors (see below), whose sum is σ = 21316343652. Its totient is φ = 18947860992.

The previous prime is 20132102303. The next prime is 20132102351. The reversal of 20132102321 is 12320123102.

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 18523210000 + 1608892321 = 136100^2 + 40111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20132102321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1184241313 = 20132102321 / (2 + 0 + 1 + 3 + 2 + 1 + 0 + 2 + 3 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20132102321.

It is not an unprimeable number, because it can be changed into a prime (20132102351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592120640 + ... + 592120673.

It is an arithmetic number, because the mean of its divisors is an integer number (5329085913).

Almost surely, 2^20132102321 is an apocalyptic number.

It is an amenable number.

20132102321 is a deficient number, since it is larger than the sum of its proper divisors (1184241331).

20132102321 is a wasteful number, since it uses less digits than its factorization.

20132102321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184241330.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20132102321 its reverse (12320123102), we get a palindrome (32452225423).

The spelling of 20132102321 in words is "twenty billion, one hundred thirty-two million, one hundred two thousand, three hundred twenty-one".