20765061 has 6 divisors (see below), whose sum is σ = 29993990. Its totient is φ = 13843368.

The previous prime is 20765051. The next prime is 20765077. The reversal of 20765061 is 16056702.

20765061 is a `hidden beast` number, since 2 + 0 + 7 + 650 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18533025 + 2232036 = 4305^2 + 1494^2 .

It is not a de Polignac number, because 20765061 - 2¹¹ = 20763013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20765051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1153606 + ... + 1153623.

Almost surely, 2^20765061 is an apocalyptic number.

It is an amenable number.

20765061 is a deficient number, since it is larger than the sum of its proper divisors (9228929).

20765061 is a wasteful number, since it uses less digits than its factorization.

20765061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307235 (or 2307232 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20765061 is about 4556.8696492219. The cubic root of 20765061 is about 274.8597014379.

The spelling of 20765061 in words is "twenty million, seven hundred sixty-five thousand, sixty-one".