20020102177 has 2 divisors, whose sum is σ = 20020102178. Its totient is φ = 20020102176.

The previous prime is 20020102171. The next prime is 20020102231. The reversal of 20020102177 is 77120102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11924421601 + 8095680576 = 109199^2 + 89976^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020102177 - 2³ = 20020102169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020102171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010051088 + 10010051089.

It is an arithmetic number, because the mean of its divisors is an integer number (10010051089).

Almost surely, 2^20020102177 is an apocalyptic number.

It is an amenable number.

20020102177 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020102177 is an equidigital number, since it uses as much as digits as its factorization.

20020102177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

Adding to 20020102177 its reverse (77120102002), we get a palindrome (97140204179).

The spelling of 20020102177 in words is "twenty billion, twenty million, one hundred two thousand, one hundred seventy-seven".