20423014443149 has 2 divisors, whose sum is σ = 20423014443150. Its totient is φ = 20423014443148.

The previous prime is 20423014443101. The next prime is 20423014443163. The reversal of 20423014443149 is 94134441032402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20049304746025 + 373709697124 = 4477645^2 + 611318^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423014443149 - 2³² = 20418719475853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423014443449) 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, 10211507221574 + 10211507221575.

It is an arithmetic number, because the mean of its divisors is an integer number (10211507221575).

Almost surely, 2^{20423014443149} is an apocalyptic number.

It is an amenable number.

20423014443149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423014443149 is an equidigital number, since it uses as much as digits as its factorization.

20423014443149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 20423014443149 in words is "twenty trillion, four hundred twenty-three billion, fourteen million, four hundred forty-three thousand, one hundred forty-nine".