36005021 has 4 divisors (see below), whose sum is σ = 38774652. Its totient is φ = 33235392.

The previous prime is 36005017. The next prime is 36005029. The reversal of 36005021 is 12050063.

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 6996025 + 29008996 = 2645^2 + 5386^2 .

It is a cyclic number.

It is not a de Polignac number, because 36005021 - 2² = 36005017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36005029) 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, 1384796 + ... + 1384821.

It is an arithmetic number, because the mean of its divisors is an integer number (9693663).

Almost surely, 2^36005021 is an apocalyptic number.

It is an amenable number.

36005021 is a deficient number, since it is larger than the sum of its proper divisors (2769631).

36005021 is a wasteful number, since it uses less digits than its factorization.

36005021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769630.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 36005021 is about 6000.4184020783. The cubic root of 36005021 is about 330.2080750802.

Adding to 36005021 its reverse (12050063), we get a palindrome (48055084).

The spelling of 36005021 in words is "thirty-six million, five thousand, twenty-one".