20016869 has 8 divisors (see below), whose sum is σ = 20295000. Its totient is φ = 19740672.

The previous prime is 20016847. The next prime is 20016883. The reversal of 20016869 is 96861002.

It can be written as a sum of positive squares in 4 ways, for example, as 10176100 + 9840769 = 3190^2 + 3137^2 .

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 20016869 - 2⁸ = 20016613 is a prime.

It is a super-2 number, since 2×20016869² = 801350089126322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016839) 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, 44357 + ... + 44805.

It is an arithmetic number, because the mean of its divisors is an integer number (2536875).

Almost surely, 2^20016869 is an apocalyptic number.

It is an amenable number.

20016869 is a deficient number, since it is larger than the sum of its proper divisors (278131).

20016869 is a wasteful number, since it uses less digits than its factorization.

20016869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20016869 is about 4474.0215690137. The cubic root of 20016869 is about 271.5180560646.

The spelling of 20016869 in words is "twenty million, sixteen thousand, eight hundred sixty-nine".