20146256573 has 2 divisors, whose sum is σ = 20146256574. Its totient is φ = 20146256572.

The previous prime is 20146256539. The next prime is 20146256591. The reversal of 20146256573 is 37565264102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14850347044 + 5295909529 = 121862^2 + 72773^2 .

It is a cyclic number.

It is not a de Polignac number, because 20146256573 - 2⁶ = 20146256509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20146256573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20146253573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073128286 + 10073128287.

It is an arithmetic number, because the mean of its divisors is an integer number (10073128287).

Almost surely, 2^20146256573 is an apocalyptic number.

It is an amenable number.

20146256573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20146256573 is an equidigital number, since it uses as much as digits as its factorization.

20146256573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 20146256573 in words is "twenty billion, one hundred forty-six million, two hundred fifty-six thousand, five hundred seventy-three".