36504670021 has 2 divisors, whose sum is σ = 36504670022. Its totient is φ = 36504670020.

The previous prime is 36504670019. The next prime is 36504670051. The reversal of 36504670021 is 12007640563.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26326685025 + 10177984996 = 162255^2 + 100886^2 .

It is a cyclic number.

It is not a de Polignac number, because 36504670021 - 2¹ = 36504670019 is a prime.

It is a super-2 number, since 2×36504670021² (a number of 22 digits) contains 22 as substring.

Together with 36504670019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36504670051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18252335010 + 18252335011.

It is an arithmetic number, because the mean of its divisors is an integer number (18252335011).

Almost surely, 2^36504670021 is an apocalyptic number.

It is an amenable number.

36504670021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36504670021 is an equidigital number, since it uses as much as digits as its factorization.

36504670021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 36504670021 in words is "thirty-six billion, five hundred four million, six hundred seventy thousand, twenty-one".