20000115 has 64 divisors (see below), whose sum is σ = 37785600. Its totient is φ = 10147680.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000115 is 51100002.

It is a happy number.

It is not a de Polignac number, because 20000115 - 2³ = 20000107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20000097 and 20000106.

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 63 ways as a sum of consecutive naturals, for example, 338956 + ... + 339014.

It is an arithmetic number, because the mean of its divisors is an integer number (590400).

Almost surely, 2^20000115 is an apocalyptic number.

20000115 is a deficient number, since it is larger than the sum of its proper divisors (17785485).

20000115 is an frugal number, since it uses more digits than its factorization.

20000115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 20000115 is about 4472.1488123720. The cubic root of 20000115 is about 271.4422819219.

Adding to 20000115 its reverse (51100002), we get a palindrome (71100117).

The spelling of 20000115 in words is "twenty million, one hundred fifteen", and thus it is an aban number.