20247315 has 32 divisors (see below), whose sum is σ = 35548416. Its totient is φ = 9759360.

The previous prime is 20247313. The next prime is 20247319. The reversal of 20247315 is 51374202.

It is not a de Polignac number, because 20247315 - 2¹ = 20247313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20247313) 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 31 ways as a sum of consecutive naturals, for example, 45484 + ... + 45926.

It is an arithmetic number, because the mean of its divisors is an integer number (1110888).

Almost surely, 2^20247315 is an apocalyptic number.

20247315 is a deficient number, since it is larger than the sum of its proper divisors (15301101).

20247315 is a wasteful number, since it uses less digits than its factorization.

20247315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20247315 is about 4499.7016567768. The cubic root of 20247315 is about 272.5560415558.

It can be divided in two parts, 2024 and 7315, that added together give a palindrome (9339).

The spelling of 20247315 in words is "twenty million, two hundred forty-seven thousand, three hundred fifteen".