20970708 has 48 divisors (see below), whose sum is σ = 54082560. Its totient is φ = 6271200.

The previous prime is 20970701. The next prime is 20970709. The reversal of 20970708 is 80707902.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9423 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (1126720).

Almost surely, 2^20970708 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 20970708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27041280).

20970708 is an abundant number, since it is smaller than the sum of its proper divisors (33111852).

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

20970708 is a wasteful number, since it uses less digits than its factorization.

20970708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 20970708 is about 4579.3785604599. The cubic root of 20970708 is about 275.7640811128.

The spelling of 20970708 in words is "twenty million, nine hundred seventy thousand, seven hundred eight".