20825984 has 16 divisors (see below), whose sum is σ = 41489520. Its totient is φ = 10412928.

The previous prime is 20825983. The next prime is 20825989. The reversal of 20825984 is 48952802.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81224 + ... + 81479.

It is an arithmetic number, because the mean of its divisors is an integer number (2593095).

Almost surely, 2^20825984 is an apocalyptic number.

It is an amenable number.

20825984 is a deficient number, since it is larger than the sum of its proper divisors (20663536).

20825984 is an equidigital number, since it uses as much as digits as its factorization.

20825984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162717 (or 162705 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 20825984 is about 4563.5494957325. The cubic root of 20825984 is about 275.1282443171.

The spelling of 20825984 in words is "twenty million, eight hundred twenty-five thousand, nine hundred eighty-four".