20884265 has 8 divisors (see below), whose sum is σ = 25472328. Its totient is φ = 16433280.

The previous prime is 20884247. The next prime is 20884267. The reversal of 20884265 is 56248802.

It can be written as a sum of positive squares in 4 ways, for example, as 885481 + 19998784 = 941^2 + 4472^2 .

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

It is not a de Polignac number, because 20884265 - 2⁸ = 20884009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20884267) 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, 33932 + ... + 34541.

It is an arithmetic number, because the mean of its divisors is an integer number (3184041).

Almost surely, 2^20884265 is an apocalyptic number.

It is an amenable number.

20884265 is a deficient number, since it is larger than the sum of its proper divisors (4588063).

20884265 is an equidigital number, since it uses as much as digits as its factorization.

20884265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68539.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 20884265 is about 4569.9305246360. The cubic root of 20884265 is about 275.3846518063.

The spelling of 20884265 in words is "twenty million, eight hundred eighty-four thousand, two hundred sixty-five".