20517016 has 16 divisors (see below), whose sum is σ = 41428800. Its totient is φ = 9469344.

The previous prime is 20516999. The next prime is 20517031. The reversal of 20517016 is 61071502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98536 + ... + 98743.

It is an arithmetic number, because the mean of its divisors is an integer number (2589300).

Almost surely, 2^20517016 is an apocalyptic number.

20517016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20517016 is an abundant number, since it is smaller than the sum of its proper divisors (20911784).

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

20517016 is a wasteful number, since it uses less digits than its factorization.

20517016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197298 (or 197294 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20517016 is about 4529.5712821414. The cubic root of 20517016 is about 273.7608868157.

Adding to 20517016 its reverse (61071502), we get a palindrome (81588518).

The spelling of 20517016 in words is "twenty million, five hundred seventeen thousand, sixteen".