20841888 has 48 divisors (see below), whose sum is σ = 55248480. Its totient is φ = 6878976.

The previous prime is 20841883. The next prime is 20841911. The reversal of 20841888 is 88814802.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20841883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9258 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (1151010).

Almost surely, 2^20841888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20841888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27624240).

20841888 is an abundant number, since it is smaller than the sum of its proper divisors (34406592).

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

20841888 is a wasteful number, since it uses less digits than its factorization.

20841888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149 (or 2141 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 20841888 is about 4565.2916664765. The cubic root of 20841888 is about 275.1982614366.

The spelling of 20841888 in words is "twenty million, eight hundred forty-one thousand, eight hundred eighty-eight".