20716385 has 8 divisors (see below), whose sum is σ = 25159680. Its totient is φ = 16373104.

The previous prime is 20716379. The next prime is 20716391. The reversal of 20716385 is 58361702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20716379) and next prime (20716391).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20716385 - 2⁴ = 20716369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24545 + ... + 25374.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^20716385 is an apocalyptic number.

It is an amenable number.

20716385 is a deficient number, since it is larger than the sum of its proper divisors (4443295).

20716385 is an equidigital number, since it uses as much as digits as its factorization.

20716385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50007.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20716385 is about 4551.5255684221. The cubic root of 20716385 is about 274.6447644570.

The spelling of 20716385 in words is "twenty million, seven hundred sixteen thousand, three hundred eighty-five".