20005315 has 32 divisors (see below), whose sum is σ = 27371520. Its totient is φ = 13910400.

The previous prime is 20005313. The next prime is 20005319. The reversal of 20005315 is 51350002.

It is not a de Polignac number, because 20005315 - 2¹ = 20005313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20005313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183481 + ... + 183589.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^20005315 is an apocalyptic number.

20005315 is a deficient number, since it is larger than the sum of its proper divisors (7366205).

20005315 is a wasteful number, since it uses less digits than its factorization.

20005315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 20005315 is about 4472.7301505904. The cubic root of 20005315 is about 271.4658047459.

Adding to 20005315 its reverse (51350002), we get a palindrome (71355317).

The spelling of 20005315 in words is "twenty million, five thousand, three hundred fifteen".