20091953423 has 2 divisors, whose sum is σ = 20091953424. Its totient is φ = 20091953422.

The previous prime is 20091953411. The next prime is 20091953467. The reversal of 20091953423 is 32435919002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20091953423 - 2¹⁰ = 20091952399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20091953473) 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, 10045976711 + 10045976712.

It is an arithmetic number, because the mean of its divisors is an integer number (10045976712).

Almost surely, 2^20091953423 is an apocalyptic number.

20091953423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20091953423 is an equidigital number, since it uses as much as digits as its factorization.

20091953423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 20091953423 in words is "twenty billion, ninety-one million, nine hundred fifty-three thousand, four hundred twenty-three".