21032030177 has 2 divisors, whose sum is σ = 21032030178. Its totient is φ = 21032030176.

The previous prime is 21032030081. The next prime is 21032030237. The reversal of 21032030177 is 77103023012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16610312161 + 4421718016 = 128881^2 + 66496^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032030177 - 2²⁸ = 20763594721 is a prime.

It is not a weakly prime, because it can be changed into another prime (21032030077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516015088 + 10516015089.

It is an arithmetic number, because the mean of its divisors is an integer number (10516015089).

Almost surely, 2^21032030177 is an apocalyptic number.

It is an amenable number.

21032030177 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032030177 is an equidigital number, since it uses as much as digits as its factorization.

21032030177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 26.

Adding to 21032030177 its reverse (77103023012), we get a palindrome (98135053189).

The spelling of 21032030177 in words is "twenty-one billion, thirty-two million, thirty thousand, one hundred seventy-seven".