20200345 has 24 divisors (see below), whose sum is σ = 26937288. Its totient is φ = 14530560.

The previous prime is 20200343. The next prime is 20200387. The reversal of 20200345 is 54300202.

It can be written as a sum of positive squares in 4 ways, for example, as 3455881 + 16744464 = 1859^2 + 4092^2 .

It is not a de Polignac number, because 20200345 - 2¹ = 20200343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200343) 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 23 ways as a sum of consecutive naturals, for example, 104569 + ... + 104761.

It is an arithmetic number, because the mean of its divisors is an integer number (1122387).

Almost surely, 2^20200345 is an apocalyptic number.

It is an amenable number.

20200345 is a deficient number, since it is larger than the sum of its proper divisors (6736943).

20200345 is a wasteful number, since it uses less digits than its factorization.

20200345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20200345 is about 4494.4793914312. The cubic root of 20200345 is about 272.3451186189.

Adding to 20200345 its reverse (54300202), we get a palindrome (74500547).

The spelling of 20200345 in words is "twenty million, two hundred thousand, three hundred forty-five".