20000016 has 30 divisors (see below), whose sum is σ = 55972670. Its totient is φ = 6666624.

The previous prime is 20000003. The next prime is 20000023. The reversal of 20000016 is 61000002.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 9734400 = 3204^2 + 3120^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 19999962 and 20000007.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69301 + ... + 69588.

Almost surely, 2^20000016 is an apocalyptic number.

It is an amenable number.

20000016 is an abundant number, since it is smaller than the sum of its proper divisors (35972654).

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

20000016 is a wasteful number, since it uses less digits than its factorization.

20000016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138903 (or 138894 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20000016 is about 4472.1377438536. The cubic root of 20000016 is about 271.4418340439.

Adding to 20000016 its reverse (61000002), we get a palindrome (81000018).

It can be divided in two parts, 200000 and 16, that multiplied together give a 5-th power (3200000 = 20⁵).

The spelling of 20000016 in words is "twenty million, sixteen", and thus it is an aban number and an uban number.