20404232032321 has 8 divisors (see below), whose sum is σ = 20723795434944. Its totient is φ = 20085562514640.

The previous prime is 20404232032313. The next prime is 20404232032339. The reversal of 20404232032321 is 12323023240402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404232032321 - 2³ = 20404232032313 is a prime.

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 20404232032321.

It is not an unprimeable number, because it can be changed into a prime (20404232032391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223425226 + ... + 223516531.

It is an arithmetic number, because the mean of its divisors is an integer number (2590474429368).

Almost surely, 2^{20404232032321} is an apocalyptic number.

It is an amenable number.

20404232032321 is a deficient number, since it is larger than the sum of its proper divisors (319563402623).

20404232032321 is an equidigital number, since it uses as much as digits as its factorization.

20404232032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446942471.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20404232032321 its reverse (12323023240402), we get a palindrome (32727255272723).

The spelling of 20404232032321 in words is "twenty trillion, four hundred four billion, two hundred thirty-two million, thirty-two thousand, three hundred twenty-one".