20963845 has 8 divisors (see below), whose sum is σ = 28750464. Its totient is φ = 14375184.

The previous prime is 20963837. The next prime is 20963849. The reversal of 20963845 is 54836902.

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 20963845 - 2³ = 20963837 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 (20963849) 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 7 ways as a sum of consecutive naturals, for example, 299449 + ... + 299518.

It is an arithmetic number, because the mean of its divisors is an integer number (3593808).

Almost surely, 2^20963845 is an apocalyptic number.

It is an amenable number.

20963845 is a deficient number, since it is larger than the sum of its proper divisors (7786619).

20963845 is an equidigital number, since it uses as much as digits as its factorization.

20963845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598979.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20963845 is about 4578.6291616596. The cubic root of 20963845 is about 275.7339950933.

The spelling of 20963845 in words is "twenty million, nine hundred sixty-three thousand, eight hundred forty-five".