20125516161827 has 2 divisors, whose sum is σ = 20125516161828. Its totient is φ = 20125516161826.

The previous prime is 20125516161703. The next prime is 20125516161833. The reversal of 20125516161827 is 72816161552102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20125516161827 - 2²⁰ = 20125515113251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20125516161857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062758080913 + 10062758080914.

It is an arithmetic number, because the mean of its divisors is an integer number (10062758080914).

Almost surely, 2^{20125516161827} is an apocalyptic number.

20125516161827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125516161827 is an equidigital number, since it uses as much as digits as its factorization.

20125516161827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 20125516161827 in words is "twenty trillion, one hundred twenty-five billion, five hundred sixteen million, one hundred sixty-one thousand, eight hundred twenty-seven".