20680192 has 60 divisors (see below), whose sum is σ = 44930160. Its totient is φ = 9504768.

The previous prime is 20680183. The next prime is 20680199. The reversal of 20680192 is 29108602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20680192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86409 + ... + 86647.

It is an arithmetic number, because the mean of its divisors is an integer number (748836).

Almost surely, 2^20680192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20680192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22465080).

20680192 is an abundant number, since it is smaller than the sum of its proper divisors (24249968).

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

20680192 is an equidigital number, since it uses as much as digits as its factorization.

20680192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20680192 is about 4547.5479106877. The cubic root of 20680192 is about 274.4847299024.

Adding to 20680192 its reverse (29108602), we get a palindrome (49788794).

The spelling of 20680192 in words is "twenty million, six hundred eighty thousand, one hundred ninety-two".