20215316 has 24 divisors (see below), whose sum is σ = 40625760. Its totient is φ = 8704800.

The previous prime is 20215303. The next prime is 20215319. The reversal of 20215316 is 61351202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11255 + ... + 12926.

It is an arithmetic number, because the mean of its divisors is an integer number (1692740).

Almost surely, 2^20215316 is an apocalyptic number.

It is an amenable number.

20215316 is an abundant number, since it is smaller than the sum of its proper divisors (20410444).

20215316 is a wasteful number, since it uses less digits than its factorization.

20215316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24215 (or 24213 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20215316 is about 4496.1445706294. The cubic root of 20215316 is about 272.4123826834.

Adding to 20215316 its reverse (61351202), we get a palindrome (81566518).

It can be divided in two parts, 2021 and 5316, that added together give a palindrome (7337).

The spelling of 20215316 in words is "twenty million, two hundred fifteen thousand, three hundred sixteen".