36600021 has 6 divisors (see below), whose sum is σ = 52866710. Its totient is φ = 24400008.

The previous prime is 36600019. The next prime is 36600041. The reversal of 36600021 is 12000663.

It is a happy number.

36600021 is a `hidden beast` number, since 3 + 660 + 0 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36360900 + 239121 = 6030^2 + 489^2 .

It is not a de Polignac number, because 36600021 - 2¹ = 36600019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36599967 and 36600003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36600041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2033326 + ... + 2033343.

Almost surely, 2^36600021 is an apocalyptic number.

It is an amenable number.

36600021 is a deficient number, since it is larger than the sum of its proper divisors (16266689).

36600021 is a wasteful number, since it uses less digits than its factorization.

36600021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066675 (or 4066672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 36600021 is about 6049.7951204979. The cubic root of 36600021 is about 332.0170946102.

Adding to 36600021 its reverse (12000663), we get a palindrome (48600684).

The spelling of 36600021 in words is "thirty-six million, six hundred thousand, twenty-one".