20710680 has 32 divisors (see below), whose sum is σ = 62132400. Its totient is φ = 5522816.

The previous prime is 20710673. The next prime is 20710687. The reversal of 20710680 is 8601702.

It is an interprime number because it is at equal distance from previous prime (20710673) and next prime (20710687).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20710680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86175 + ... + 86414.

Almost surely, 2^20710680 is an apocalyptic number.

20710680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20710680 is an abundant number, since it is smaller than the sum of its proper divisors (41421720).

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

20710680 is a wasteful number, since it uses less digits than its factorization.

20710680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172603 (or 172599 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20710680 is about 4550.8988123227. The cubic root of 20710680 is about 274.6195510453.

The spelling of 20710680 in words is "twenty million, seven hundred ten thousand, six hundred eighty".