20108664 has 48 divisors (see below), whose sum is σ = 54681120. Its totient is φ = 6675840.

The previous prime is 20108657. The next prime is 20108729. The reversal of 20108664 is 46680102.

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 11 ways as a sum of consecutive naturals, for example, 26044 + ... + 26804.

It is an arithmetic number, because the mean of its divisors is an integer number (1139190).

Almost surely, 2^20108664 is an apocalyptic number.

20108664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20108664 is an abundant number, since it is smaller than the sum of its proper divisors (34572456).

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

20108664 is a wasteful number, since it uses less digits than its factorization.

20108664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20108664 is about 4484.2685022197. The cubic root of 20108664 is about 271.9324731449.

Adding to 20108664 its reverse (46680102), we get a palindrome (66788766).

The spelling of 20108664 in words is "twenty million, one hundred eight thousand, six hundred sixty-four".