20874805 has 8 divisors (see below), whose sum is σ = 28628352. Its totient is φ = 14314128.

The previous prime is 20874779. The next prime is 20874817. The reversal of 20874805 is 50847802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20874805 - 2⁷ = 20874677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 298177 + ... + 298246.

It is an arithmetic number, because the mean of its divisors is an integer number (3578544).

Almost surely, 2^20874805 is an apocalyptic number.

It is an amenable number.

20874805 is a deficient number, since it is larger than the sum of its proper divisors (7753547).

20874805 is an equidigital number, since it uses as much as digits as its factorization.

20874805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596435.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 20874805 is about 4568.8953807239. The cubic root of 20874805 is about 275.3430649584.

The spelling of 20874805 in words is "twenty million, eight hundred seventy-four thousand, eight hundred five".