36436021 has 2 divisors, whose sum is σ = 36436022. Its totient is φ = 36436020.

The previous prime is 36436019. The next prime is 36436027. The reversal of 36436021 is 12063463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 902500 = 5961^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 36436021 - 2¹ = 36436019 is a prime.

Together with 36436019, 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 (36436027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18218010 + 18218011.

It is an arithmetic number, because the mean of its divisors is an integer number (18218011).

Almost surely, 2^36436021 is an apocalyptic number.

It is an amenable number.

36436021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36436021 is an equidigital number, since it uses as much as digits as its factorization.

36436021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 36436021 is about 6036.2257247389. The cubic root of 36436021 is about 331.5204433869.

Adding to 36436021 its reverse (12063463), we get a palindrome (48499484).

The spelling of 36436021 in words is "thirty-six million, four hundred thirty-six thousand, twenty-one".