20115339091 has 2 divisors, whose sum is σ = 20115339092. Its totient is φ = 20115339090.

The previous prime is 20115339031. The next prime is 20115339113. The reversal of 20115339091 is 19093351102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20115339091 - 2¹¹ = 20115337043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20115339031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057669545 + 10057669546.

It is an arithmetic number, because the mean of its divisors is an integer number (10057669546).

Almost surely, 2^20115339091 is an apocalyptic number.

20115339091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115339091 is an equidigital number, since it uses as much as digits as its factorization.

20115339091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The spelling of 20115339091 in words is "twenty billion, one hundred fifteen million, three hundred thirty-nine thousand, ninety-one".