20680242 has 32 divisors (see below), whose sum is σ = 45287424. Its totient is φ = 6243600.

The previous prime is 20680217. The next prime is 20680249. The reversal of 20680242 is 24208602.

It is not an unprimeable number, because it can be changed into a prime (20680249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28083 + ... + 28809.

It is an arithmetic number, because the mean of its divisors is an integer number (1415232).

Almost surely, 2^20680242 is an apocalyptic number.

20680242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20680242 is an abundant number, since it is smaller than the sum of its proper divisors (24607182).

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

20680242 is a wasteful number, since it uses less digits than its factorization.

20680242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20680242 is about 4547.5534081526. The cubic root of 20680242 is about 274.4849511161.

Adding to 20680242 its reverse (24208602), we get a palindrome (44888844).

The spelling of 20680242 in words is "twenty million, six hundred eighty thousand, two hundred forty-two".