20555273 has 4 divisors (see below), whose sum is σ = 20578560. Its totient is φ = 20531988.

The previous prime is 20555251. The next prime is 20555299. The reversal of 20555273 is 37255502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20555273 - 2⁶ = 20555209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555203) 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 in 3 ways as a sum of consecutive naturals, for example, 10265 + ... + 12102.

It is an arithmetic number, because the mean of its divisors is an integer number (5144640).

Almost surely, 2^20555273 is an apocalyptic number.

It is an amenable number.

20555273 is a deficient number, since it is larger than the sum of its proper divisors (23287).

20555273 is an equidigital number, since it uses as much as digits as its factorization.

20555273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23286.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 20555273 is about 4533.7923419583. The cubic root of 20555273 is about 273.9309370044.

The spelling of 20555273 in words is "twenty million, five hundred fifty-five thousand, two hundred seventy-three".