20333959949 has 2 divisors, whose sum is σ = 20333959950. Its totient is φ = 20333959948.

The previous prime is 20333959937. The next prime is 20333959969. The reversal of 20333959949 is 94995933302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16674556900 + 3659403049 = 129130^2 + 60493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20333959949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20333959894 and 20333959903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20333959969) 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, 10166979974 + 10166979975.

It is an arithmetic number, because the mean of its divisors is an integer number (10166979975).

Almost surely, 2^20333959949 is an apocalyptic number.

It is an amenable number.

20333959949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333959949 is an equidigital number, since it uses as much as digits as its factorization.

20333959949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7085880, while the sum is 56.

The spelling of 20333959949 in words is "twenty billion, three hundred thirty-three million, nine hundred fifty-nine thousand, nine hundred forty-nine".