36411821 has 2 divisors, whose sum is σ = 36411822. Its totient is φ = 36411820.

The previous prime is 36411803. The next prime is 36411833. The reversal of 36411821 is 12811463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26894596 + 9517225 = 5186^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 36411821 - 2¹⁰ = 36410797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36411871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18205910 + 18205911.

It is an arithmetic number, because the mean of its divisors is an integer number (18205911).

Almost surely, 2^36411821 is an apocalyptic number.

It is an amenable number.

36411821 is a deficient number, since it is larger than the sum of its proper divisors (1).

36411821 is an equidigital number, since it uses as much as digits as its factorization.

36411821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 36411821 is about 6034.2208279114. The cubic root of 36411821 is about 331.4470309473.

It can be divided in two parts, 3641 and 1821, that multiplied together give a triangular number (6630261 = T₃₆₄₁).

The spelling of 36411821 in words is "thirty-six million, four hundred eleven thousand, eight hundred twenty-one".