20133030257 has 2 divisors, whose sum is σ = 20133030258. Its totient is φ = 20133030256.

The previous prime is 20133030251. The next prime is 20133030277. The reversal of 20133030257 is 75203033102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15967102321 + 4165927936 = 126361^2 + 64544^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133030257 - 2⁴ = 20133030241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20133030251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066515128 + 10066515129.

It is an arithmetic number, because the mean of its divisors is an integer number (10066515129).

Almost surely, 2^20133030257 is an apocalyptic number.

It is an amenable number.

20133030257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133030257 is an equidigital number, since it uses as much as digits as its factorization.

20133030257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 26.

Adding to 20133030257 its reverse (75203033102), we get a palindrome (95336063359).

The spelling of 20133030257 in words is "twenty billion, one hundred thirty-three million, thirty thousand, two hundred fifty-seven".