20164425091 has 2 divisors, whose sum is σ = 20164425092. Its totient is φ = 20164425090.

The previous prime is 20164425049. The next prime is 20164425109. The reversal of 20164425091 is 19052446102.

Together with next prime (20164425109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20164425091 - 2¹¹ = 20164423043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20164425691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10082212545 + 10082212546.

It is an arithmetic number, because the mean of its divisors is an integer number (10082212546).

Almost surely, 2^20164425091 is an apocalyptic number.

20164425091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20164425091 is an equidigital number, since it uses as much as digits as its factorization.

20164425091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 20164425091 in words is "twenty billion, one hundred sixty-four million, four hundred twenty-five thousand, ninety-one".