20756708 has 48 divisors (see below), whose sum is σ = 43110144. Its totient is φ = 8561280.

The previous prime is 20756707. The next prime is 20756717. The reversal of 20756708 is 80765702.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (20756707) 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, 105266 + ... + 105462.

It is an arithmetic number, because the mean of its divisors is an integer number (898128).

Almost surely, 2^20756708 is an apocalyptic number.

20756708 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 20756708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21555072).

20756708 is an abundant number, since it is smaller than the sum of its proper divisors (22353436).

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

20756708 is a wasteful number, since it uses less digits than its factorization.

20756708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 20756708 is about 4555.9530287307. The cubic root of 20756708 is about 274.8228412683.

The spelling of 20756708 in words is "twenty million, seven hundred fifty-six thousand, seven hundred eight".