20104324091 has 2 divisors, whose sum is σ = 20104324092. Its totient is φ = 20104324090.

The previous prime is 20104324087. The next prime is 20104324171. The reversal of 20104324091 is 19042340102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20104324091 - 2² = 20104324087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20104324091.

It is not a weakly prime, because it can be changed into another prime (20104324021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052162045 + 10052162046.

It is an arithmetic number, because the mean of its divisors is an integer number (10052162046).

Almost surely, 2^20104324091 is an apocalyptic number.

20104324091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104324091 is an equidigital number, since it uses as much as digits as its factorization.

20104324091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 20104324091 its reverse (19042340102), we get a palindrome (39146664193).

The spelling of 20104324091 in words is "twenty billion, one hundred four million, three hundred twenty-four thousand, ninety-one".