20125465174709 has 2 divisors, whose sum is σ = 20125465174710. Its totient is φ = 20125465174708.

The previous prime is 20125465174687. The next prime is 20125465174817. The reversal of 20125465174709 is 90747156452102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12306786658609 + 7818678516100 = 3508103^2 + 2796190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20125465174709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20125465174909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062732587354 + 10062732587355.

It is an arithmetic number, because the mean of its divisors is an integer number (10062732587355).

Almost surely, 2^{20125465174709} is an apocalyptic number.

It is an amenable number.

20125465174709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125465174709 is an equidigital number, since it uses as much as digits as its factorization.

20125465174709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 20125465174709 in words is "twenty trillion, one hundred twenty-five billion, four hundred sixty-five million, one hundred seventy-four thousand, seven hundred nine".