20112915 has 8 divisors (see below), whose sum is σ = 32180688. Its totient is φ = 10726880.

The previous prime is 20112907. The next prime is 20112929. The reversal of 20112915 is 51921102.

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

It is not a de Polignac number, because 20112915 - 2³ = 20112907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112891 and 20112900.

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, 670416 + ... + 670445.

It is an arithmetic number, because the mean of its divisors is an integer number (4022586).

Almost surely, 2^20112915 is an apocalyptic number.

20112915 is a deficient number, since it is larger than the sum of its proper divisors (12067773).

20112915 is a wasteful number, since it uses less digits than its factorization.

20112915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340869.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 20112915 is about 4484.7424675225. The cubic root of 20112915 is about 271.9516340978.

The spelling of 20112915 in words is "twenty million, one hundred twelve thousand, nine hundred fifteen".