20775544 has 8 divisors (see below), whose sum is σ = 38954160. Its totient is φ = 10387768.

The previous prime is 20775541. The next prime is 20775577. The reversal of 20775544 is 44557702.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775541) 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 as a sum of consecutive naturals, namely, 1298464 + ... + 1298479.

It is an arithmetic number, because the mean of its divisors is an integer number (4869270).

Almost surely, 2^20775544 is an apocalyptic number.

It is an amenable number.

20775544 is a deficient number, since it is larger than the sum of its proper divisors (18178616).

20775544 is a wasteful number, since it uses less digits than its factorization.

20775544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596949 (or 2596945 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 20775544 is about 4558.0197454596. The cubic root of 20775544 is about 274.9059468998.

The spelling of 20775544 in words is "twenty million, seven hundred seventy-five thousand, five hundred forty-four".