36446821 has 2 divisors, whose sum is σ = 36446822. Its totient is φ = 36446820.

The previous prime is 36446819. The next prime is 36446833. The reversal of 36446821 is 12864463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28238596 + 8208225 = 5314^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 36446821 - 2¹ = 36446819 is a prime.

It is a super-2 number, since 2×36446821² = 2656741522012082, which contains 22 as substring.

Together with 36446819, 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 (36446801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18223410 + 18223411.

It is an arithmetic number, because the mean of its divisors is an integer number (18223411).

Almost surely, 2^36446821 is an apocalyptic number.

It is an amenable number.

36446821 is a deficient number, since it is larger than the sum of its proper divisors (1).

36446821 is an equidigital number, since it uses as much as digits as its factorization.

36446821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The square root of 36446821 is about 6037.1202572087. The cubic root of 36446821 is about 331.5531954730.

It can be divided in two parts, 364468 and 21, that multiplied together give a triangular number (7653828 = T₃₉₁₂).

The spelling of 36446821 in words is "thirty-six million, four hundred forty-six thousand, eight hundred twenty-one".