20015115 has 8 divisors (see below), whose sum is σ = 32024208. Its totient is φ = 10674720.

The previous prime is 20015087. The next prime is 20015131. The reversal of 20015115 is 51151002.

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

It is not a de Polignac number, because 20015115 - 2⁷ = 20014987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1334341 = 20015115 / (2 + 0 + 0 + 1 + 5 + 1 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 20015094 and 20015103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667156 + ... + 667185.

It is an arithmetic number, because the mean of its divisors is an integer number (4003026).

Almost surely, 2^20015115 is an apocalyptic number.

20015115 is a deficient number, since it is larger than the sum of its proper divisors (12009093).

20015115 is a wasteful number, since it uses less digits than its factorization.

20015115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334349.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 20015115 is about 4473.8255442071. The cubic root of 20015115 is about 271.5101251443.

Adding to 20015115 its reverse (51151002), we get a palindrome (71166117).

The spelling of 20015115 in words is "twenty million, fifteen thousand, one hundred fifteen".