20104421231 has 2 divisors, whose sum is σ = 20104421232. Its totient is φ = 20104421230.

The previous prime is 20104421219. The next prime is 20104421237. The reversal of 20104421231 is 13212440102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20104421231 - 2²⁶ = 20037312367 is a prime.

It is a super-2 number, since 2×20104421231² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20104421237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052210615 + 10052210616.

It is an arithmetic number, because the mean of its divisors is an integer number (10052210616).

Almost surely, 2^20104421231 is an apocalyptic number.

20104421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104421231 is an equidigital number, since it uses as much as digits as its factorization.

20104421231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20104421231 its reverse (13212440102), we get a palindrome (33316861333).

The spelling of 20104421231 in words is "twenty billion, one hundred four million, four hundred twenty-one thousand, two hundred thirty-one".