20361245 has 4 divisors (see below), whose sum is σ = 24433500. Its totient is φ = 16288992.

The previous prime is 20361241. The next prime is 20361281. The reversal of 20361245 is 54216302.

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 9947716 + 10413529 = 3154^2 + 3227^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361245 - 2² = 20361241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20361245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20361241) 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, 2036120 + ... + 2036129.

It is an arithmetic number, because the mean of its divisors is an integer number (6108375).

Almost surely, 2^20361245 is an apocalyptic number.

It is an amenable number.

20361245 is a deficient number, since it is larger than the sum of its proper divisors (4072255).

20361245 is an equidigital number, since it uses as much as digits as its factorization.

20361245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072254.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20361245 is about 4512.3436260994. The cubic root of 20361245 is about 273.0663025997.

Adding to 20361245 its reverse (54216302), we get a palindrome (74577547).

The spelling of 20361245 in words is "twenty million, three hundred sixty-one thousand, two hundred forty-five".