20105548 has 12 divisors (see below), whose sum is σ = 35781480. Its totient is φ = 9882272.

The previous prime is 20105521. The next prime is 20105549. The reversal of 20105548 is 84550102.

It is not an unprimeable number, because it can be changed into a prime (20105549) 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 3 ways as a sum of consecutive naturals, for example, 42361 + ... + 42832.

It is an arithmetic number, because the mean of its divisors is an integer number (2981790).

Almost surely, 2^20105548 is an apocalyptic number.

It is an amenable number.

20105548 is a deficient number, since it is larger than the sum of its proper divisors (15675932).

20105548 is a wasteful number, since it uses less digits than its factorization.

20105548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85256 (or 85254 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20105548 is about 4483.9210519366. The cubic root of 20105548 is about 271.9184263745.

The spelling of 20105548 in words is "twenty million, one hundred five thousand, five hundred forty-eight".