20473723 has 2 divisors, whose sum is σ = 20473724. Its totient is φ = 20473722.

The previous prime is 20473721. The next prime is 20473751. The reversal of 20473723 is 32737402.

It is an a-pointer prime, because the next prime (20473751) can be obtained adding 20473723 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20473723 - 2¹ = 20473721 is a prime.

Together with 20473721, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20473691 and 20473700.

It is not a weakly prime, because it can be changed into another prime (20473721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236861 + 10236862.

It is an arithmetic number, because the mean of its divisors is an integer number (10236862).

Almost surely, 2^20473723 is an apocalyptic number.

20473723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473723 is an equidigital number, since it uses as much as digits as its factorization.

20473723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 20473723 is about 4524.7898293733. The cubic root of 20473723 is about 273.5681967396.

The spelling of 20473723 in words is "twenty million, four hundred seventy-three thousand, seven hundred twenty-three".