20850257573 has 16 divisors (see below), whose sum is σ = 21797677440. Its totient is φ = 19928595456.

The previous prime is 20850257539. The next prime is 20850257579. The reversal of 20850257573 is 37575205802.

It is a cyclic number.

It is not a de Polignac number, because 20850257573 - 2¹⁴ = 20850241189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850257579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343136 + ... + 399302.

It is an arithmetic number, because the mean of its divisors is an integer number (1362354840).

Almost surely, 2^20850257573 is an apocalyptic number.

It is an amenable number.

20850257573 is a deficient number, since it is larger than the sum of its proper divisors (947419867).

20850257573 is an equidigital number, since it uses as much as digits as its factorization.

20850257573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56396.

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 20850257573 in words is "twenty billion, eight hundred fifty million, two hundred fifty-seven thousand, five hundred seventy-three".