20759131 has 2 divisors, whose sum is σ = 20759132. Its totient is φ = 20759130.

The previous prime is 20759129. The next prime is 20759143. The reversal of 20759131 is 13195702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20759131 - 2¹ = 20759129 is a prime.

It is a super-2 number, since 2×20759131² = 861883039750322, which contains 22 as substring.

Together with 20759129, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20759131.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10379565 + 10379566.

It is an arithmetic number, because the mean of its divisors is an integer number (10379566).

Almost surely, 2^20759131 is an apocalyptic number.

20759131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20759131 is an equidigital number, since it uses as much as digits as its factorization.

20759131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 20759131 is about 4556.2189367940. The cubic root of 20759131 is about 274.8335345156.

The spelling of 20759131 in words is "twenty million, seven hundred fifty-nine thousand, one hundred thirty-one".