20120315 has 4 divisors (see below), whose sum is σ = 24144384. Its totient is φ = 16096248.

The previous prime is 20120281. The next prime is 20120323. The reversal of 20120315 is 51302102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120315 - 2⁶ = 20120251 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 20120315.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2012027 + ... + 2012036.

It is an arithmetic number, because the mean of its divisors is an integer number (6036096).

Almost surely, 2^20120315 is an apocalyptic number.

20120315 is a deficient number, since it is larger than the sum of its proper divisors (4024069).

20120315 is an equidigital number, since it uses as much as digits as its factorization.

20120315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024068.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20120315 is about 4485.5674111532. The cubic root of 20120315 is about 271.9849824105.

Adding to 20120315 its reverse (51302102), we get a palindrome (71422417).

The spelling of 20120315 in words is "twenty million, one hundred twenty thousand, three hundred fifteen".