20550368 has 12 divisors (see below), whose sum is σ = 40458600. Its totient is φ = 10275168.

The previous prime is 20550347. The next prime is 20550377. The reversal of 20550368 is 86305502.

It is a self number, because there is not a number n which added to its sum of digits gives 20550368.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 321068 + ... + 321131.

It is an arithmetic number, because the mean of its divisors is an integer number (3371550).

Almost surely, 2^20550368 is an apocalyptic number.

It is an amenable number.

20550368 is a deficient number, since it is larger than the sum of its proper divisors (19908232).

20550368 is an equidigital number, since it uses as much as digits as its factorization.

20550368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642209 (or 642201 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20550368 is about 4533.2513718081. The cubic root of 20550368 is about 273.9091463568.

The spelling of 20550368 in words is "twenty million, five hundred fifty thousand, three hundred sixty-eight".