20555103 has 8 divisors (see below), whose sum is σ = 27438768. Its totient is φ = 13687424.

The previous prime is 20555083. The next prime is 20555141. The reversal of 20555103 is 30155502.

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

It is a cyclic number.

It is not a de Polignac number, because 20555103 - 2⁵ = 20555071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20555103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (3429846).

Almost surely, 2^20555103 is an apocalyptic number.

20555103 is a deficient number, since it is larger than the sum of its proper divisors (6883665).

20555103 is an equidigital number, since it uses as much as digits as its factorization.

20555103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 20555103 is about 4533.7735938178. The cubic root of 20555103 is about 273.9301818310.

The spelling of 20555103 in words is "twenty million, five hundred fifty-five thousand, one hundred three".