20452255 has 4 divisors (see below), whose sum is σ = 24542712. Its totient is φ = 16361800.

The previous prime is 20452253. The next prime is 20452261. The reversal of 20452255 is 55225402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55225402 = 2 ⋅27612701.

It is not a de Polignac number, because 20452255 - 2¹ = 20452253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045221 + ... + 2045230.

It is an arithmetic number, because the mean of its divisors is an integer number (6135678).

Almost surely, 2^20452255 is an apocalyptic number.

20452255 is a deficient number, since it is larger than the sum of its proper divisors (4090457).

20452255 is an equidigital number, since it uses as much as digits as its factorization.

20452255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090456.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20452255 is about 4522.4169422998. The cubic root of 20452255 is about 273.4725454184.

Adding to 20452255 its reverse (55225402), we get a palindrome (75677657).

The spelling of 20452255 in words is "twenty million, four hundred fifty-two thousand, two hundred fifty-five".