20841395 has 4 divisors (see below), whose sum is σ = 25009680. Its totient is φ = 16673112.

The previous prime is 20841391. The next prime is 20841409. The reversal of 20841395 is 59314802.

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

It is a cyclic number.

It is not a de Polignac number, because 20841395 - 2² = 20841391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20841391) 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, 2084135 + ... + 2084144.

It is an arithmetic number, because the mean of its divisors is an integer number (6252420).

Almost surely, 2^20841395 is an apocalyptic number.

20841395 is a deficient number, since it is larger than the sum of its proper divisors (4168285).

20841395 is an equidigital number, since it uses as much as digits as its factorization.

20841395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168284.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20841395 is about 4565.2376717976. The cubic root of 20841395 is about 275.1960915467.

The spelling of 20841395 in words is "twenty million, eight hundred forty-one thousand, three hundred ninety-five".