20131302091 has 2 divisors, whose sum is σ = 20131302092. Its totient is φ = 20131302090.

The previous prime is 20131302083. The next prime is 20131302101. The reversal of 20131302091 is 19020313102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20131302091 - 2³ = 20131302083 is a prime.

It is not a weakly prime, because it can be changed into another prime (20131302001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065651045 + 10065651046.

It is an arithmetic number, because the mean of its divisors is an integer number (10065651046).

Almost surely, 2^20131302091 is an apocalyptic number.

20131302091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131302091 is an equidigital number, since it uses as much as digits as its factorization.

20131302091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 20131302091 its reverse (19020313102), we get a palindrome (39151615193).

The spelling of 20131302091 in words is "twenty billion, one hundred thirty-one million, three hundred two thousand, ninety-one".