20711488 has 56 divisors (see below), whose sum is σ = 47621952. Its totient is φ = 8753664.

The previous prime is 20711473. The next prime is 20711497. The reversal of 20711488 is 88411702.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36906 + ... + 37462.

It is an arithmetic number, because the mean of its divisors is an integer number (850392).

Almost surely, 2^20711488 is an apocalyptic number.

20711488 is a gapful number since it is divisible by the number (28) 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 20711488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23810976).

20711488 is an abundant number, since it is smaller than the sum of its proper divisors (26910464).

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

20711488 is an equidigital number, since it uses as much as digits as its factorization.

20711488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 20711488 is about 4550.9875851292. The cubic root of 20711488 is about 274.6231223060.

The spelling of 20711488 in words is "twenty million, seven hundred eleven thousand, four hundred eighty-eight".