20715708 has 72 divisors (see below), whose sum is σ = 54051312. Its totient is φ = 6137856.

The previous prime is 20715703. The next prime is 20715713. The reversal of 20715708 is 80751702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20715703) and next prime (20715713).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20715703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213516 + ... + 213612.

Almost surely, 2^20715708 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 20715708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27025656).

20715708 is an abundant number, since it is smaller than the sum of its proper divisors (33335604).

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

20715708 is a wasteful number, since it uses less digits than its factorization.

20715708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20715708 is about 4551.4511971458. The cubic root of 20715708 is about 274.6417726781.

The spelling of 20715708 in words is "twenty million, seven hundred fifteen thousand, seven hundred eight".