20053555 has 8 divisors (see below), whose sum is σ = 24224544. Its totient is φ = 15936000.

The previous prime is 20053543. The next prime is 20053571. The reversal of 20053555 is 55535002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20053555 - 2⁹ = 20053043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12526 + ... + 14035.

It is an arithmetic number, because the mean of its divisors is an integer number (3028068).

Almost surely, 2^20053555 is an apocalyptic number.

20053555 is a deficient number, since it is larger than the sum of its proper divisors (4170989).

20053555 is a wasteful number, since it uses less digits than its factorization.

20053555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26717.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 20053555 is about 4478.1195830393. The cubic root of 20053555 is about 271.6838301141.

Adding to 20053555 its reverse (55535002), we get a palindrome (75588557).

The spelling of 20053555 in words is "twenty million, fifty-three thousand, five hundred fifty-five".