20707488 has 72 divisors (see below), whose sum is σ = 61090848. Its totient is φ = 6899904.

The previous prime is 20707483. The next prime is 20707507. The reversal of 20707488 is 88470702.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20707483) 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 11 ways as a sum of consecutive naturals, for example, 6445 + ... + 9107.

It is an arithmetic number, because the mean of its divisors is an integer number (848484).

Almost surely, 2^20707488 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 20707488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30545424).

20707488 is an abundant number, since it is smaller than the sum of its proper divisors (40383360).

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

20707488 is an equidigital number, since it uses as much as digits as its factorization.

20707488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688 (or 2668 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 20707488 is about 4550.5480988558. The cubic root of 20707488 is about 274.6054418893.

The spelling of 20707488 in words is "twenty million, seven hundred seven thousand, four hundred eighty-eight".