20869888 has 36 divisors (see below), whose sum is σ = 44869888. Its totient is φ = 9630720.

The previous prime is 20869883. The next prime is 20869889. The reversal of 20869888 is 88896802.

It is not an unprimeable number, because it can be changed into a prime (20869883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 6463.

Almost surely, 2^20869888 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 20869888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22434944).

20869888 is an abundant number, since it is smaller than the sum of its proper divisors (24000000).

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

20869888 is an equidigital number, since it uses as much as digits as its factorization.

20869888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300 (or 6286 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 20869888 is about 4568.3572539809. The cubic root of 20869888 is about 275.3214445063.

The spelling of 20869888 in words is "twenty million, eight hundred sixty-nine thousand, eight hundred eighty-eight".