20161752727 has 2 divisors, whose sum is σ = 20161752728. Its totient is φ = 20161752726.

The previous prime is 20161752703. The next prime is 20161752731. The reversal of 20161752727 is 72725716102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20161752727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20161752727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20167752727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10080876363 + 10080876364.

It is an arithmetic number, because the mean of its divisors is an integer number (10080876364).

Almost surely, 2^20161752727 is an apocalyptic number.

20161752727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20161752727 is an equidigital number, since it uses as much as digits as its factorization.

20161752727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 20161752727 in words is "twenty billion, one hundred sixty-one million, seven hundred fifty-two thousand, seven hundred twenty-seven".