20134134257 has 2 divisors, whose sum is σ = 20134134258. Its totient is φ = 20134134256.

The previous prime is 20134134089. The next prime is 20134134271. The reversal of 20134134257 is 75243143102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19724517136 + 409617121 = 140444^2 + 20239^2 .

It is a cyclic number.

It is not a de Polignac number, because 20134134257 - 2¹² = 20134130161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20134134457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067067128 + 10067067129.

It is an arithmetic number, because the mean of its divisors is an integer number (10067067129).

Almost surely, 2^20134134257 is an apocalyptic number.

It is an amenable number.

20134134257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134134257 is an equidigital number, since it uses as much as digits as its factorization.

20134134257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 20134134257 its reverse (75243143102), we get a palindrome (95377277359).

The spelling of 20134134257 in words is "twenty billion, one hundred thirty-four million, one hundred thirty-four thousand, two hundred fifty-seven".