20016659 has 8 divisors (see below), whose sum is σ = 21715680. Its totient is φ = 18340416.

The previous prime is 20016649. The next prime is 20016677. The reversal of 20016659 is 95661002.

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 20016659 - 2⁴ = 20016643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20016649) 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, 3839 + ... + 7400.

It is an arithmetic number, because the mean of its divisors is an integer number (2714460).

Almost surely, 2^20016659 is an apocalyptic number.

20016659 is a deficient number, since it is larger than the sum of its proper divisors (1699021).

20016659 is a wasteful number, since it uses less digits than its factorization.

20016659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11389.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20016659 is about 4473.9981001337. The cubic root of 20016659 is about 271.5171065490.

The spelling of 20016659 in words is "twenty million, sixteen thousand, six hundred fifty-nine".