20888000 has 112 divisors (see below), whose sum is σ = 59277504. Its totient is φ = 7142400.

The previous prime is 20887967. The next prime is 20888003. The reversal of 20888000 is 88802.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20888003) 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 15 ways as a sum of consecutive naturals, for example, 55814 + ... + 56186.

Almost surely, 2^20888000 is an apocalyptic number.

20888000 is a gapful number since it is divisible by the number (20) 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 20888000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29638752).

20888000 is an abundant number, since it is smaller than the sum of its proper divisors (38389504).

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

20888000 is an equidigital number, since it uses as much as digits as its factorization.

20888000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 20888000 is about 4570.3391559052. The cubic root of 20888000 is about 275.4010676799.

The spelling of 20888000 in words is "twenty million, eight hundred eighty-eight thousand".