20705016 has 32 divisors (see below), whose sum is σ = 52968960. Its totient is φ = 6740832.

The previous prime is 20704987. The next prime is 20705017. The reversal of 20705016 is 61050702.

It is a junction number, because it is equal to n+sod(n) for n = 20704983 and 20705001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9000 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (1655280).

Almost surely, 2^20705016 is an apocalyptic number.

It is an amenable number.

20705016 is an abundant number, since it is smaller than the sum of its proper divisors (32263944).

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

20705016 is a wasteful number, since it uses less digits than its factorization.

20705016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20115 (or 20111 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20705016 is about 4550.2764751166. The cubic root of 20705016 is about 274.5945142534.

Adding to 20705016 its reverse (61050702), we get a palindrome (81755718).

The spelling of 20705016 in words is "twenty million, seven hundred five thousand, sixteen".