20775065 has 4 divisors (see below), whose sum is σ = 24930084. Its totient is φ = 16620048.

The previous prime is 20775061. The next prime is 20775077. The reversal of 20775065 is 56057702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8886361 + 11888704 = 2981^2 + 3448^2 .

It is a cyclic number.

It is not a de Polignac number, because 20775065 - 2² = 20775061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20775061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077502 + ... + 2077511.

It is an arithmetic number, because the mean of its divisors is an integer number (6232521).

Almost surely, 2^20775065 is an apocalyptic number.

It is an amenable number.

20775065 is a deficient number, since it is larger than the sum of its proper divisors (4155019).

20775065 is an equidigital number, since it uses as much as digits as its factorization.

20775065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155018.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 20775065 is about 4557.9672004085. The cubic root of 20775065 is about 274.9038341439.

The spelling of 20775065 in words is "twenty million, seven hundred seventy-five thousand, sixty-five".