20552017 has 4 divisors (see below), whose sum is σ = 20690100. Its totient is φ = 20413936.

The previous prime is 20552011. The next prime is 20552071. The reversal of 20552017 is 71025502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71025502 = 2 ⋅35512751.

It can be written as a sum of positive squares in 2 ways, for example, as 9235521 + 11316496 = 3039^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 20552017 - 2³ = 20552009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20552011) 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, 68818 + ... + 69115.

It is an arithmetic number, because the mean of its divisors is an integer number (5172525).

Almost surely, 2^20552017 is an apocalyptic number.

It is an amenable number.

20552017 is a deficient number, since it is larger than the sum of its proper divisors (138083).

20552017 is a wasteful number, since it uses less digits than its factorization.

20552017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138082.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20552017 is about 4533.4332464480. The cubic root of 20552017 is about 273.9164724884.

Adding to 20552017 its reverse (71025502), we get a palindrome (91577519).

The spelling of 20552017 in words is "twenty million, five hundred fifty-two thousand, seventeen".