20016650 has 24 divisors (see below), whose sum is σ = 39422700. Its totient is φ = 7535360.

The previous prime is 20016649. The next prime is 20016677. The reversal of 20016650 is 5661002.

It can be written as a sum of positive squares in 6 ways, for example, as 3214849 + 16801801 = 1793^2 + 4099^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10925 + ... + 12624.

Almost surely, 2^20016650 is an apocalyptic number.

20016650 is a deficient number, since it is larger than the sum of its proper divisors (19406050).

20016650 is a wasteful number, since it uses less digits than its factorization.

20016650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23578 (or 23573 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20016650 is about 4473.9970943218. The cubic root of 20016650 is about 271.5170658553.

Adding to 20016650 its reverse (5661002), we get a palindrome (25677652).

The spelling of 20016650 in words is "twenty million, sixteen thousand, six hundred fifty".