20040413321 has 2 divisors, whose sum is σ = 20040413322. Its totient is φ = 20040413320.

The previous prime is 20040413317. The next prime is 20040413333. The reversal of 20040413321 is 12331404002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19771453321 + 268960000 = 140611^2 + 16400^2 .

It is a cyclic number.

It is not a de Polignac number, because 20040413321 - 2² = 20040413317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20040413293 and 20040413302.

It is not a weakly prime, because it can be changed into another prime (20040413311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020206660 + 10020206661.

It is an arithmetic number, because the mean of its divisors is an integer number (10020206661).

Almost surely, 2^20040413321 is an apocalyptic number.

It is an amenable number.

20040413321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040413321 is an equidigital number, since it uses as much as digits as its factorization.

20040413321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20040413321 its reverse (12331404002), we get a palindrome (32371817323).

The spelling of 20040413321 in words is "twenty billion, forty million, four hundred thirteen thousand, three hundred twenty-one".