20194969 has 2 divisors, whose sum is σ = 20194970. Its totient is φ = 20194968.

The previous prime is 20194957. The next prime is 20194973. The reversal of 20194969 is 96949102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 2930944 = 4155^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 20194969 - 2⁷ = 20194841 is a prime.

It is a super-2 number, since 2×20194969² = 815673545821922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20192969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097484 + 10097485.

It is an arithmetic number, because the mean of its divisors is an integer number (10097485).

Almost surely, 2^20194969 is an apocalyptic number.

It is an amenable number.

20194969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194969 is an equidigital number, since it uses as much as digits as its factorization.

20194969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 20194969 is about 4493.8812845913. The cubic root of 20194969 is about 272.3209563705.

The spelling of 20194969 in words is "twenty million, one hundred ninety-four thousand, nine hundred sixty-nine".