20123315 has 8 divisors (see below), whose sum is σ = 24198480. Its totient is φ = 16064992.

The previous prime is 20123293. The next prime is 20123339. The reversal of 20123315 is 51332102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123315 - 2¹² = 20119219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123293 and 20123302.

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 7 ways as a sum of consecutive naturals, for example, 1409 + ... + 6498.

It is an arithmetic number, because the mean of its divisors is an integer number (3024810).

Almost surely, 2^20123315 is an apocalyptic number.

20123315 is a deficient number, since it is larger than the sum of its proper divisors (4075165).

20123315 is an equidigital number, since it uses as much as digits as its factorization.

20123315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20123315 is about 4485.9018045428. The cubic root of 20123315 is about 271.9984996673.

Adding to 20123315 its reverse (51332102), we get a palindrome (71455417).

The spelling of 20123315 in words is "twenty million, one hundred twenty-three thousand, three hundred fifteen".