20140404091 has 2 divisors, whose sum is σ = 20140404092. Its totient is φ = 20140404090.

The previous prime is 20140404077. The next prime is 20140404121. The reversal of 20140404091 is 19040404102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20140404091 - 2⁵ = 20140404059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20140404001) 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 as a sum of consecutive naturals, namely, 10070202045 + 10070202046.

It is an arithmetic number, because the mean of its divisors is an integer number (10070202046).

Almost surely, 2^20140404091 is an apocalyptic number.

20140404091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140404091 is an equidigital number, since it uses as much as digits as its factorization.

20140404091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 20140404091 its reverse (19040404102), we get a palindrome (39180808193).

The spelling of 20140404091 in words is "twenty billion, one hundred forty million, four hundred four thousand, ninety-one".