20361650 has 12 divisors (see below), whose sum is σ = 37872762. Its totient is φ = 8144640.

The previous prime is 20361641. The next prime is 20361659. The reversal of 20361650 is 5616302.

It is an interprime number because it is at equal distance from previous prime (20361641) and next prime (20361659).

It can be written as a sum of positive squares in 3 ways, for example, as 12313081 + 8048569 = 3509^2 + 2837^2 .

It is not an unprimeable number, because it can be changed into a prime (20361659) 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, 203567 + ... + 203666.

Almost surely, 2^20361650 is an apocalyptic number.

20361650 is a deficient number, since it is larger than the sum of its proper divisors (17511112).

20361650 is a wasteful number, since it uses less digits than its factorization.

20361650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407245 (or 407240 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20361650 is about 4512.3885027777. The cubic root of 20361650 is about 273.0681130836.

Adding to 20361650 its reverse (5616302), we get a palindrome (25977952).

The spelling of 20361650 in words is "twenty million, three hundred sixty-one thousand, six hundred fifty".