20126680 has 32 divisors (see below), whose sum is σ = 51755040. Its totient is φ = 6900480.

The previous prime is 20126671. The next prime is 20126693. The reversal of 20126680 is 8662102.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 35661 + ... + 36220.

It is an arithmetic number, because the mean of its divisors is an integer number (1617345).

Almost surely, 2^20126680 is an apocalyptic number.

20126680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20126680 is an abundant number, since it is smaller than the sum of its proper divisors (31628360).

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

20126680 is a wasteful number, since it uses less digits than its factorization.

20126680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71899 (or 71895 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20126680 is about 4486.2768528034. The cubic root of 20126680 is about 272.0136599253.

Adding to 20126680 its reverse (8662102), we get a palindrome (28788782).

The spelling of 20126680 in words is "twenty million, one hundred twenty-six thousand, six hundred eighty".