36342821 has 4 divisors (see below), whose sum is σ = 38480652. Its totient is φ = 34204992.

The previous prime is 36342811. The next prime is 36342833. The reversal of 36342821 is 12824363.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21520321 + 14822500 = 4639^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 36342821 - 2¹⁰ = 36341797 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 (36342811) 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, 1068890 + ... + 1068923.

It is an arithmetic number, because the mean of its divisors is an integer number (9620163).

Almost surely, 2^36342821 is an apocalyptic number.

It is an amenable number.

36342821 is a deficient number, since it is larger than the sum of its proper divisors (2137831).

36342821 is a wasteful number, since it uses less digits than its factorization.

36342821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137830.

The product of its digits is 6912, while the sum is 29.

The square root of 36342821 is about 6028.5007257195. The cubic root of 36342821 is about 331.2375357361.

The spelling of 36342821 in words is "thirty-six million, three hundred forty-two thousand, eight hundred twenty-one".