20743711 has 2 divisors, whose sum is σ = 20743712. Its totient is φ = 20743710.

The previous prime is 20743703. The next prime is 20743739. The reversal of 20743711 is 11734702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20743711 - 2³ = 20743703 is a prime.

It is equal to p_1314790 and since 20743711 and 1314790 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20743771) 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, 10371855 + 10371856.

It is an arithmetic number, because the mean of its divisors is an integer number (10371856).

Almost surely, 2^20743711 is an apocalyptic number.

20743711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20743711 is an equidigital number, since it uses as much as digits as its factorization.

20743711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20743711 is about 4554.5264298278. The cubic root of 20743711 is about 274.7654683579.

Subtracting from 20743711 its reverse (11734702), we obtain a palindrome (9009009).

The spelling of 20743711 in words is "twenty million, seven hundred forty-three thousand, seven hundred eleven".