36000021 has 12 divisors (see below), whose sum is σ = 49602336. Its totient is φ = 23223960.

The previous prime is 36000007. The next prime is 36000059. The reversal of 36000021 is 12000063.

It is not a de Polignac number, because 36000021 - 2⁷ = 35999893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 35999970 and 36000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36000071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3361 + ... + 9126.

It is an arithmetic number, because the mean of its divisors is an integer number (4133528).

Almost surely, 2^36000021 is an apocalyptic number.

36000021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

36000021 is a deficient number, since it is larger than the sum of its proper divisors (13602315).

36000021 is a wasteful number, since it uses less digits than its factorization.

36000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12552 (or 12521 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 36000021 is about 6000.0017499997. The cubic root of 36000021 is about 330.1927890936.

Adding to 36000021 its reverse (12000063), we get a palindrome (48000084).

The spelling of 36000021 in words is "thirty-six million, twenty-one", and thus it is an aban number and an uban number.