20884105 has 16 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 15136000.

The previous prime is 20884103. The next prime is 20884133. The reversal of 20884105 is 50148802.

It is not a de Polignac number, because 20884105 - 2¹ = 20884103 is a prime.

It is a super-2 number, since 2×20884105² = 872291683302050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20884103) 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 15 ways as a sum of consecutive naturals, for example, 23265 + ... + 24145.

It is an arithmetic number, because the mean of its divisors is an integer number (1714608).

Almost surely, 2^20884105 is an apocalyptic number.

It is an amenable number.

20884105 is a deficient number, since it is larger than the sum of its proper divisors (6549623).

20884105 is a wasteful number, since it uses less digits than its factorization.

20884105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20884105 is about 4569.9130188659. The cubic root of 20884105 is about 275.3839485391.

The spelling of 20884105 in words is "twenty million, eight hundred eighty-four thousand, one hundred five".