20712708 has 36 divisors (see below), whose sum is σ = 53637948. Its totient is φ = 6735360.

The previous prime is 20712707. The next prime is 20712709. The reversal of 20712708 is 80721702.

It is an interprime number because it is at equal distance from previous prime (20712707) and next prime (20712709).

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 19079424 = 1278^2 + 4368^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20712707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5541 + ... + 8492.

It is an arithmetic number, because the mean of its divisors is an integer number (1489943).

Almost surely, 2^20712708 is an apocalyptic number.

It is an amenable number.

20712708 is an abundant number, since it is smaller than the sum of its proper divisors (32925240).

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

20712708 is a wasteful number, since it uses less digits than its factorization.

20712708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14084 (or 14079 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 20712708 is about 4551.1216199965. The cubic root of 20712708 is about 274.6285143800.

The spelling of 20712708 in words is "twenty million, seven hundred twelve thousand, seven hundred eight".