20310115 has 16 divisors (see below), whose sum is σ = 28753920. Its totient is φ = 13476960.

The previous prime is 20310091. The next prime is 20310119. The reversal of 20310115 is 51101302.

It is a de Polignac number, because none of the positive numbers 2^k-20310115 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20310095 and 20310104.

It is not an unprimeable number, because it can be changed into a prime (20310119) 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 15 ways as a sum of consecutive naturals, for example, 8275 + ... + 10444.

It is an arithmetic number, because the mean of its divisors is an integer number (1797120).

Almost surely, 2^20310115 is an apocalyptic number.

20310115 is a deficient number, since it is larger than the sum of its proper divisors (8443805).

20310115 is a wasteful number, since it uses less digits than its factorization.

20310115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18762.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 20310115 is about 4506.6744945691. The cubic root of 20310115 is about 272.8375414877.

Adding to 20310115 its reverse (51101302), we get a palindrome (71411417).

The spelling of 20310115 in words is "twenty million, three hundred ten thousand, one hundred fifteen".