20550373 has 4 divisors (see below), whose sum is σ = 20623788. Its totient is φ = 20476960.

The previous prime is 20550347. The next prime is 20550377. The reversal of 20550373 is 37305502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14876449 + 5673924 = 3857^2 + 2382^2 .

It is a cyclic number.

It is not a de Polignac number, because 20550373 - 2⁹ = 20549861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36286 + ... + 36847.

It is an arithmetic number, because the mean of its divisors is an integer number (5155947).

Almost surely, 2^20550373 is an apocalyptic number.

It is an amenable number.

20550373 is a deficient number, since it is larger than the sum of its proper divisors (73415).

20550373 is an equidigital number, since it uses as much as digits as its factorization.

20550373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73414.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 20550373 is about 4533.2519232886. The cubic root of 20550373 is about 273.9091685712.

Adding to 20550373 its reverse (37305502), we get a palindrome (57855875).

The spelling of 20550373 in words is "twenty million, five hundred fifty thousand, three hundred seventy-three".