20808126 has 24 divisors (see below), whose sum is σ = 45658080. Its totient is φ = 6847776.

The previous prime is 20808107. The next prime is 20808233. The reversal of 20808126 is 62180802.

It is a self number, because there is not a number n which added to its sum of digits gives 20808126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5895 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (1902420).

Almost surely, 2^20808126 is an apocalyptic number.

20808126 is an abundant number, since it is smaller than the sum of its proper divisors (24849954).

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

20808126 is a wasteful number, since it uses less digits than its factorization.

20808126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14720 (or 14717 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20808126 is about 4561.5924850868. The cubic root of 20808126 is about 275.0495822444.

Adding to 20808126 its reverse (62180802), we get a palindrome (82988928).

The spelling of 20808126 in words is "twenty million, eight hundred eight thousand, one hundred twenty-six".