20184958699949 has 2 divisors, whose sum is σ = 20184958699950. Its totient is φ = 20184958699948.

The previous prime is 20184958699909. The next prime is 20184958699993. The reversal of 20184958699949 is 94999685948102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19730635518724 + 454323181225 = 4441918^2 + 674035^2 .

It is a cyclic number.

It is not a de Polignac number, because 20184958699949 - 2⁸ = 20184958699693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20184958699909) 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, 10092479349974 + 10092479349975.

It is an arithmetic number, because the mean of its divisors is an integer number (10092479349975).

Almost surely, 2^{20184958699949} is an apocalyptic number.

It is an amenable number.

20184958699949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20184958699949 is an equidigital number, since it uses as much as digits as its factorization.

20184958699949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3627970560, while the sum is 83.

The spelling of 20184958699949 in words is "twenty trillion, one hundred eighty-four billion, nine hundred fifty-eight million, six hundred ninety-nine thousand, nine hundred forty-nine".