20759671 has 2 divisors, whose sum is σ = 20759672. Its totient is φ = 20759670.

The previous prime is 20759633. The next prime is 20759693. The reversal of 20759671 is 17695702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20759671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20759671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20759171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10379835 + 10379836.

It is an arithmetic number, because the mean of its divisors is an integer number (10379836).

Almost surely, 2^20759671 is an apocalyptic number.

20759671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20759671 is an equidigital number, since it uses as much as digits as its factorization.

20759671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 20759671 is about 4556.2781960719. The cubic root of 20759671 is about 274.8359175445.

The spelling of 20759671 in words is "twenty million, seven hundred fifty-nine thousand, six hundred seventy-one".