20995265 has 8 divisors (see below), whose sum is σ = 25498368. Its totient is φ = 16593520.

The previous prime is 20995237. The next prime is 20995267. The reversal of 20995265 is 56259902.

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

It is not a de Polignac number, because 20995265 - 2⁶ = 20995201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20995267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24881 + ... + 25710.

It is an arithmetic number, because the mean of its divisors is an integer number (3187296).

Almost surely, 2^20995265 is an apocalyptic number.

It is an amenable number.

20995265 is a deficient number, since it is larger than the sum of its proper divisors (4503103).

20995265 is an equidigital number, since it uses as much as digits as its factorization.

20995265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50679.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 20995265 is about 4582.0590349754. The cubic root of 20995265 is about 275.8716803557.

The spelling of 20995265 in words is "twenty million, nine hundred ninety-five thousand, two hundred sixty-five".