20116500 has 48 divisors (see below), whose sum is σ = 58583616. Its totient is φ = 5364000.

The previous prime is 20116487. The next prime is 20116531. The reversal of 20116500 is 561102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20116500.

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 15 ways as a sum of consecutive naturals, for example, 5206 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (1220492).

Almost surely, 2^20116500 is an apocalyptic number.

20116500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20116500 is an abundant number, since it is smaller than the sum of its proper divisors (38467116).

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

20116500 is a wasteful number, since it uses less digits than its factorization.

20116500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13433 (or 13421 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 20116500 is about 4485.1421382159. The cubic root of 20116500 is about 271.9677910246.

Adding to 20116500 its reverse (561102), we get a palindrome (20677602).

The spelling of 20116500 in words is "twenty million, one hundred sixteen thousand, five hundred".