20256384 has 128 divisors (see below), whose sum is σ = 59486400. Its totient is φ = 6078464.

The previous prime is 20256377. The next prime is 20256391. The reversal of 20256384 is 48365202.

It is an interprime number because it is at equal distance from previous prime (20256377) and next prime (20256391).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189259 + ... + 189365.

Almost surely, 2^20256384 is an apocalyptic number.

20256384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20256384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29743200).

20256384 is an abundant number, since it is smaller than the sum of its proper divisors (39230016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20256384 is a wasteful number, since it uses less digits than its factorization.

20256384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20256384 is about 4500.7092774362. The cubic root of 20256384 is about 272.5967291199.

The spelling of 20256384 in words is "twenty million, two hundred fifty-six thousand, three hundred eighty-four".