20452205 has 4 divisors (see below), whose sum is σ = 24542652. Its totient is φ = 16361760.

The previous prime is 20452199. The next prime is 20452213. The reversal of 20452205 is 50225402.

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 7628644 + 12823561 = 2762^2 + 3581^2 .

It is not a de Polignac number, because 20452205 - 2¹⁰ = 20451181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045216 + ... + 2045225.

It is an arithmetic number, because the mean of its divisors is an integer number (6135663).

Almost surely, 2^20452205 is an apocalyptic number.

It is an amenable number.

20452205 is a deficient number, since it is larger than the sum of its proper divisors (4090447).

20452205 is an equidigital number, since it uses as much as digits as its factorization.

20452205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090446.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20452205 is about 4522.4114142789. The cubic root of 20452205 is about 273.4723225638.

Adding to 20452205 its reverse (50225402), we get a palindrome (70677607).

The spelling of 20452205 in words is "twenty million, four hundred fifty-two thousand, two hundred five".