20495915 has 8 divisors (see below), whose sum is σ = 26831088. Its totient is φ = 14906080.

The previous prime is 20495887. The next prime is 20495963. The reversal of 20495915 is 51959402.

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

It is not a de Polignac number, because 20495915 - 2¹⁴ = 20479531 is a prime.

It is a Duffinian number.

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, 186272 + ... + 186381.

It is an arithmetic number, because the mean of its divisors is an integer number (3353886).

Almost surely, 2^20495915 is an apocalyptic number.

20495915 is a deficient number, since it is larger than the sum of its proper divisors (6335173).

20495915 is a wasteful number, since it uses less digits than its factorization.

20495915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372669.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 20495915 is about 4527.2414338093. The cubic root of 20495915 is about 273.6670036059.

The spelling of 20495915 in words is "twenty million, four hundred ninety-five thousand, nine hundred fifteen".