20512673 has 2 divisors, whose sum is σ = 20512674. Its totient is φ = 20512672.

The previous prime is 20512663. The next prime is 20512691. The reversal of 20512673 is 37621502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19651489 + 861184 = 4433^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512673 - 2¹⁰ = 20511649 is a prime.

It is a super-3 number, since 3×20512673³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20512663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256336 + 10256337.

It is an arithmetic number, because the mean of its divisors is an integer number (10256337).

Almost surely, 2^20512673 is an apocalyptic number.

It is an amenable number.

20512673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512673 is an equidigital number, since it uses as much as digits as its factorization.

20512673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20512673 is about 4529.0918515747. The cubic root of 20512673 is about 273.7415690710.

The spelling of 20512673 in words is "twenty million, five hundred twelve thousand, six hundred seventy-three".