20874743 has 2 divisors, whose sum is σ = 20874744. Its totient is φ = 20874742.

The previous prime is 20874713. The next prime is 20874761. The reversal of 20874743 is 34747802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20874743 - 2²⁰ = 19826167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20874713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437371 + 10437372.

It is an arithmetic number, because the mean of its divisors is an integer number (10437372).

Almost surely, 2^20874743 is an apocalyptic number.

20874743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20874743 is an equidigital number, since it uses as much as digits as its factorization.

20874743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 20874743 is about 4568.8885957090. Note that the first 3 decimals coincide. The cubic root of 20874743 is about 275.3427923604.

The spelling of 20874743 in words is "twenty million, eight hundred seventy-four thousand, seven hundred forty-three".