20680296 has 128 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 5124096.

The previous prime is 20680271. The next prime is 20680333. The reversal of 20680296 is 69208602.

It is a super-3 number, since 3×20680296³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36850 + ... + 37406.

It is an arithmetic number, because the mean of its divisors is an integer number (527310).

Almost surely, 2^20680296 is an apocalyptic number.

20680296 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20680296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

20680296 is an abundant number, since it is smaller than the sum of its proper divisors (46815384).

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

20680296 is a wasteful number, since it uses less digits than its factorization.

20680296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20680296 is about 4547.5593454072. The cubic root of 20680296 is about 274.4851900265.

Adding to 20680296 its reverse (69208602), we get a palindrome (89888898).

The spelling of 20680296 in words is "twenty million, six hundred eighty thousand, two hundred ninety-six".