20125526661413 has 2 divisors, whose sum is σ = 20125526661414. Its totient is φ = 20125526661412.

The previous prime is 20125526661377. The next prime is 20125526661439. The reversal of 20125526661413 is 31416662552102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18416603182849 + 1708923478564 = 4291457^2 + 1307258^2 .

It is a cyclic number.

It is not a de Polignac number, because 20125526661413 - 2¹⁰ = 20125526660389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20125526661113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062763330706 + 10062763330707.

It is an arithmetic number, because the mean of its divisors is an integer number (10062763330707).

Almost surely, 2^{20125526661413} is an apocalyptic number.

It is an amenable number.

20125526661413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125526661413 is an equidigital number, since it uses as much as digits as its factorization.

20125526661413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 20125526661413 in words is "twenty trillion, one hundred twenty-five billion, five hundred twenty-six million, six hundred sixty-one thousand, four hundred thirteen".