20555041 has 4 divisors (see below), whose sum is σ = 22136212. Its totient is φ = 18973872.

The previous prime is 20555009. The next prime is 20555071. The reversal of 20555041 is 14055502.

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 2030625 + 18524416 = 1425^2 + 4304^2 .

It is a cyclic number.

It is not a de Polignac number, because 20555041 - 2⁵ = 20555009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555071) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 790566 + ... + 790591.

It is an arithmetic number, because the mean of its divisors is an integer number (5534053).

Almost surely, 2^20555041 is an apocalyptic number.

It is an amenable number.

20555041 is a deficient number, since it is larger than the sum of its proper divisors (1581171).

20555041 is a wasteful number, since it uses less digits than its factorization.

20555041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581170.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20555041 is about 4533.7667562414. The cubic root of 20555041 is about 273.9299064138.

The spelling of 20555041 in words is "twenty million, five hundred fifty-five thousand, forty-one".