20710000 has 100 divisors (see below), whose sum is σ = 53264200. Its totient is φ = 7776000.

The previous prime is 20709991. The next prime is 20710007. The reversal of 20710000 is 1702.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189946 + ... + 190054.

It is an arithmetic number, because the mean of its divisors is an integer number (532642).

Almost surely, 2^20710000 is an apocalyptic number.

20710000 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 20710000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26632100).

20710000 is an abundant number, since it is smaller than the sum of its proper divisors (32554200).

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

20710000 is a wasteful number, since it uses less digits than its factorization.

20710000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 20710000 is about 4550.8241011931. The cubic root of 20710000 is about 274.6165454569.

Adding to 20710000 its reverse (1702), we get a palindrome (20711702).

The spelling of 20710000 in words is "twenty million, seven hundred ten thousand".