20310123315 has 16 divisors (see below), whose sum is σ = 32502905856. Its totient is φ = 10829829600.

The previous prime is 20310123313. The next prime is 20310123319. The reversal of 20310123315 is 51332101302.

It is not a de Polignac number, because 20310123315 - 2¹ = 20310123313 is a prime.

It is a super-2 number, since 2×20310123315² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20310123291 and 20310123300.

It is not an unprimeable number, because it can be changed into a prime (20310123313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63331 + ... + 211260.

It is an arithmetic number, because the mean of its divisors is an integer number (2031431616).

Almost surely, 2^20310123315 is an apocalyptic number.

20310123315 is a deficient number, since it is larger than the sum of its proper divisors (12192782541).

20310123315 is a wasteful number, since it uses less digits than its factorization.

20310123315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279530.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 20310123315 its reverse (51332101302), we get a palindrome (71642224617).

The spelling of 20310123315 in words is "twenty billion, three hundred ten million, one hundred twenty-three thousand, three hundred fifteen".