20682743 has 2 divisors, whose sum is σ = 20682744. Its totient is φ = 20682742.

The previous prime is 20682719. The next prime is 20682749. The reversal of 20682743 is 34728602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20682743 - 2¹⁰ = 20681719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20682749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10341371 + 10341372.

It is an arithmetic number, because the mean of its divisors is an integer number (10341372).

Almost surely, 2^20682743 is an apocalyptic number.

20682743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20682743 is an equidigital number, since it uses as much as digits as its factorization.

20682743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20682743 is about 4547.8283828658. The cubic root of 20682743 is about 274.4960157705.

The spelling of 20682743 in words is "twenty million, six hundred eighty-two thousand, seven hundred forty-three".