20544017 has 4 divisors (see below), whose sum is σ = 22124340. Its totient is φ = 18963696.

The previous prime is 20544011. The next prime is 20544023. The reversal of 20544017 is 71044502.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20544011) and next prime (20544023).

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 11082241 = 3076^2 + 3329^2 .

It is a cyclic number.

It is not a de Polignac number, because 20544017 - 2⁴ = 20544001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20543983 and 20544001.

It is not an unprimeable number, because it can be changed into a prime (20544011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790142 + ... + 790167.

It is an arithmetic number, because the mean of its divisors is an integer number (5531085).

Almost surely, 2^20544017 is an apocalyptic number.

It is an amenable number.

20544017 is a deficient number, since it is larger than the sum of its proper divisors (1580323).

20544017 is a wasteful number, since it uses less digits than its factorization.

20544017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580322.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20544017 is about 4532.5508270730. The cubic root of 20544017 is about 273.8809266476.

Adding to 20544017 its reverse (71044502), we get a palindrome (91588519).

The spelling of 20544017 in words is "twenty million, five hundred forty-four thousand, seventeen".