20045345 has 8 divisors (see below), whose sum is σ = 24288576. Its totient is φ = 15880176.

The previous prime is 20045339. The next prime is 20045371. The reversal of 20045345 is 54354002.

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

It is a cyclic number.

It is not a de Polignac number, because 20045345 - 2⁶ = 20045281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20045345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18947 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (3036072).

Almost surely, 2^20045345 is an apocalyptic number.

It is an amenable number.

20045345 is a deficient number, since it is larger than the sum of its proper divisors (4243231).

20045345 is a wasteful number, since it uses less digits than its factorization.

20045345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39031.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20045345 is about 4477.2028097910. The cubic root of 20045345 is about 271.6467489297.

Adding to 20045345 its reverse (54354002), we get a palindrome (74399347).

The spelling of 20045345 in words is "twenty million, forty-five thousand, three hundred forty-five".