20484577 has 4 divisors (see below), whose sum is σ = 20498836. Its totient is φ = 20470320.

The previous prime is 20484547. The next prime is 20484599. The reversal of 20484577 is 77548402.

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 8346321 + 12138256 = 2889^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 20484577 - 2¹¹ = 20482529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20484547) 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, 4698 + ... + 7939.

It is an arithmetic number, because the mean of its divisors is an integer number (5124709).

Almost surely, 2^20484577 is an apocalyptic number.

It is an amenable number.

20484577 is a deficient number, since it is larger than the sum of its proper divisors (14259).

20484577 is a wasteful number, since it uses less digits than its factorization.

20484577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14258.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 20484577 is about 4525.9890631772. The cubic root of 20484577 is about 273.6165316165.

The spelling of 20484577 in words is "twenty million, four hundred eighty-four thousand, five hundred seventy-seven".