20775363 has 48 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 11128320.

The previous prime is 20775331. The next prime is 20775383. The reversal of 20775363 is 36357702.

It is a Cunningham number, because it is equal to 4558²-1.

It is not a de Polignac number, because 20775363 - 2⁵ = 20775331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20775383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214131 + ... + 214227.

It is an arithmetic number, because the mean of its divisors is an integer number (715008).

Almost surely, 2^20775363 is an apocalyptic number.

20775363 is a deficient number, since it is larger than the sum of its proper divisors (13545021).

20775363 is a wasteful number, since it uses less digits than its factorization.

20775363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 33.

The square root of 20775363 is about 4557.9998903028. Note that the first 3 decimals coincide. The cubic root of 20775363 is about 274.9051485554.

The spelling of 20775363 in words is "twenty million, seven hundred seventy-five thousand, three hundred sixty-three".