20804361 has 4 divisors (see below), whose sum is σ = 27739152. Its totient is φ = 13869572.

The previous prime is 20804309. The next prime is 20804369. The reversal of 20804361 is 16340802.

It is a happy number.

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 20804361 - 2¹⁵ = 20771593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20804369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467391 + ... + 3467396.

It is an arithmetic number, because the mean of its divisors is an integer number (6934788).

Almost surely, 2^20804361 is an apocalyptic number.

It is an amenable number.

20804361 is a deficient number, since it is larger than the sum of its proper divisors (6934791).

20804361 is an equidigital number, since it uses as much as digits as its factorization.

20804361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934790.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20804361 is about 4561.1797815916. The cubic root of 20804361 is about 275.0329921850.

It can be divided in two parts, 2080 and 4361, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20804361 in words is "twenty million, eight hundred four thousand, three hundred sixty-one".