20719016 has 16 divisors (see below), whose sum is σ = 39485940. Its totient is φ = 10189440.

The previous prime is 20718989. The next prime is 20719019. The reversal of 20719016 is 61091702.

It can be written as a sum of positive squares in 2 ways, for example, as 20666116 + 52900 = 4546^2 + 230^2 .

It is not an unprimeable number, because it can be changed into a prime (20719019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20741 + ... + 21716.

Almost surely, 2^20719016 is an apocalyptic number.

It is an amenable number.

20719016 is a deficient number, since it is larger than the sum of its proper divisors (18766924).

20719016 is a wasteful number, since it uses less digits than its factorization.

20719016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42524 (or 42520 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 20719016 is about 4551.8145832184. The cubic root of 20719016 is about 274.6563906776.

The spelling of 20719016 in words is "twenty million, seven hundred nineteen thousand, sixteen".