20883888 has 120 divisors (see below), whose sum is σ = 65286000. Its totient is φ = 6193152.

The previous prime is 20883881. The next prime is 20883893. The reversal of 20883888 is 88838802.

It is a super-2 number, since 2×20883888² = 872273555993088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20883881) 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 23 ways as a sum of consecutive naturals, for example, 46288 + ... + 46736.

It is an arithmetic number, because the mean of its divisors is an integer number (544050).

Almost surely, 2^20883888 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 20883888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32643000).

20883888 is an abundant number, since it is smaller than the sum of its proper divisors (44402112).

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

20883888 is a wasteful number, since it uses less digits than its factorization.

20883888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The square root of 20883888 is about 4569.8892765580. The cubic root of 20883888 is about 275.3829947272.

The spelling of 20883888 in words is "twenty million, eight hundred eighty-three thousand, eight hundred eighty-eight".