20000029957 has 2 divisors, whose sum is σ = 20000029958. Its totient is φ = 20000029956.

The previous prime is 20000029921. The next prime is 20000030041. The reversal of 20000029957 is 75992000002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10882453761 + 9117576196 = 104319^2 + 95486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000029957 - 2¹¹ = 20000027909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000039957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000014978 + 10000014979.

It is an arithmetic number, because the mean of its divisors is an integer number (10000014979).

Almost surely, 2^20000029957 is an apocalyptic number.

It is an amenable number.

20000029957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000029957 is an equidigital number, since it uses as much as digits as its factorization.

20000029957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

Adding to 20000029957 its reverse (75992000002), we get a palindrome (95992029959).

The spelling of 20000029957 in words is "twenty billion, twenty-nine thousand, nine hundred fifty-seven".