36205868811821 has 4 divisors (see below), whose sum is σ = 36715810626144. Its totient is φ = 35695926997500.

The previous prime is 36205868811811. The next prime is 36205868811869. The reversal of 36205868811821 is 12811886850263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36205868811821 - 2⁶ = 36205868811757 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 (36205868811811) 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, 254970907055 + ... + 254970907196.

It is an arithmetic number, because the mean of its divisors is an integer number (9178952656536).

Almost surely, 2^{36205868811821} is an apocalyptic number.

It is an amenable number.

36205868811821 is a deficient number, since it is larger than the sum of its proper divisors (509941814323).

36205868811821 is an equidigital number, since it uses as much as digits as its factorization.

36205868811821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509941814322.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 36205868811821 in words is "thirty-six trillion, two hundred five billion, eight hundred sixty-eight million, eight hundred eleven thousand, eight hundred twenty-one".