20045245 has 8 divisors (see below), whose sum is σ = 26241120. Its totient is φ = 14578320.

The previous prime is 20045243. The next prime is 20045257. The reversal of 20045245 is 54254002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20045245 - 2¹ = 20045243 is a prime.

It is a super-2 number, since 2×20045245² = 803623694220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182175 + ... + 182284.

It is an arithmetic number, because the mean of its divisors is an integer number (3280140).

Almost surely, 2^20045245 is an apocalyptic number.

It is an amenable number.

20045245 is a deficient number, since it is larger than the sum of its proper divisors (6195875).

20045245 is a wasteful number, since it uses less digits than its factorization.

20045245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364475.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20045245 is about 4477.1916420899. The cubic root of 20045245 is about 271.6462972085.

Adding to 20045245 its reverse (54254002), we get a palindrome (74299247).

The spelling of 20045245 in words is "twenty million, forty-five thousand, two hundred forty-five".