20711679 has 8 divisors (see below), whose sum is σ = 27639600. Its totient is φ = 13795776.

The previous prime is 20711671. The next prime is 20711687. The reversal of 20711679 is 97611702.

It is an interprime number because it is at equal distance from previous prime (20711671) and next prime (20711687).

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

It is not a de Polignac number, because 20711679 - 2³ = 20711671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711671) 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, 2419 + ... + 6875.

It is an arithmetic number, because the mean of its divisors is an integer number (3454950).

Almost surely, 2^20711679 is an apocalyptic number.

20711679 is a deficient number, since it is larger than the sum of its proper divisors (6927921).

20711679 is a wasteful number, since it uses less digits than its factorization.

20711679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 20711679 is about 4551.0085695371. The cubic root of 20711679 is about 274.6239664889.

The spelling of 20711679 in words is "twenty million, seven hundred eleven thousand, six hundred seventy-nine".