20884856 has 8 divisors (see below), whose sum is σ = 39159120. Its totient is φ = 10442424.

The previous prime is 20884847. The next prime is 20884859. The reversal of 20884856 is 65848802.

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 (20884859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305296 + ... + 1305311.

It is an arithmetic number, because the mean of its divisors is an integer number (4894890).

Almost surely, 2^20884856 is an apocalyptic number.

It is an amenable number.

20884856 is a deficient number, since it is larger than the sum of its proper divisors (18274264).

20884856 is a wasteful number, since it uses less digits than its factorization.

20884856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610613 (or 2610609 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 20884856 is about 4569.9951859931. The cubic root of 20884856 is about 275.3872494684.

The spelling of 20884856 in words is "twenty million, eight hundred eighty-four thousand, eight hundred fifty-six".