20541245 has 4 divisors (see below), whose sum is σ = 24649500. Its totient is φ = 16432992.

The previous prime is 20541233. The next prime is 20541259. The reversal of 20541245 is 54214502.

It is a happy number.

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 11909401 + 8631844 = 3451^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541245 - 2¹² = 20537149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20541245.

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, 2054120 + ... + 2054129.

It is an arithmetic number, because the mean of its divisors is an integer number (6162375).

Almost surely, 2^20541245 is an apocalyptic number.

It is an amenable number.

20541245 is a deficient number, since it is larger than the sum of its proper divisors (4108255).

20541245 is an equidigital number, since it uses as much as digits as its factorization.

20541245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108254.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20541245 is about 4532.2450286806. The cubic root of 20541245 is about 273.8686078611.

Adding to 20541245 its reverse (54214502), we get a palindrome (74755747).

The spelling of 20541245 in words is "twenty million, five hundred forty-one thousand, two hundred forty-five".