20846845 has 8 divisors (see below), whose sum is σ = 26487864. Its totient is φ = 15696384.

The previous prime is 20846827. The next prime is 20846851. The reversal of 20846845 is 54864802.

It can be written as a sum of positive squares in 4 ways, for example, as 1819801 + 19027044 = 1349^2 + 4362^2 .

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 20846845 - 2¹⁵ = 20814077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122544 + ... + 122713.

It is an arithmetic number, because the mean of its divisors is an integer number (3310983).

Almost surely, 2^20846845 is an apocalyptic number.

It is an amenable number.

20846845 is a deficient number, since it is larger than the sum of its proper divisors (5641019).

20846845 is a wasteful number, since it uses less digits than its factorization.

20846845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245279.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 20846845 is about 4565.8345348906. The cubic root of 20846845 is about 275.2200772729.

The spelling of 20846845 in words is "twenty million, eight hundred forty-six thousand, eight hundred forty-five".