20458673 has 2 divisors, whose sum is σ = 20458674. Its totient is φ = 20458672.

The previous prime is 20458657. The next prime is 20458681. The reversal of 20458673 is 37685402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17247409 + 3211264 = 4153^2 + 1792^2 .

It is a cyclic number.

It is not a de Polignac number, because 20458673 - 2⁴ = 20458657 is a prime.

It is not a weakly prime, because it can be changed into another prime (20458643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10229336 + 10229337.

It is an arithmetic number, because the mean of its divisors is an integer number (10229337).

Almost surely, 2^20458673 is an apocalyptic number.

It is an amenable number.

20458673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20458673 is an equidigital number, since it uses as much as digits as its factorization.

20458673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20458673 is about 4523.1264629678. The cubic root of 20458673 is about 273.5011480221.

The spelling of 20458673 in words is "twenty million, four hundred fifty-eight thousand, six hundred seventy-three".