20553350 has 12 divisors (see below), whose sum is σ = 38229324. Its totient is φ = 8221320.

The previous prime is 20553331. The next prime is 20553353. The reversal of 20553350 is 5335502.

It is a happy 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 (20553353) 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 5 ways as a sum of consecutive naturals, for example, 205484 + ... + 205583.

It is an arithmetic number, because the mean of its divisors is an integer number (3185777).

Almost surely, 2^20553350 is an apocalyptic number.

20553350 is a deficient number, since it is larger than the sum of its proper divisors (17675974).

20553350 is a wasteful number, since it uses less digits than its factorization.

20553350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411079 (or 411074 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 20553350 is about 4533.5802628827. The cubic root of 20553350 is about 273.9223944175.

Adding to 20553350 its reverse (5335502), we get a palindrome (25888852).

The spelling of 20553350 in words is "twenty million, five hundred fifty-three thousand, three hundred fifty".