20688010 has 32 divisors (see below), whose sum is σ = 42716160. Its totient is φ = 7066752.

The previous prime is 20688007. The next prime is 20688011. The reversal of 20688010 is 1088602.

It is not an unprimeable number, because it can be changed into a prime (20688011) 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, 33222 + ... + 33838.

It is an arithmetic number, because the mean of its divisors is an integer number (1334880).

Almost surely, 2^20688010 is an apocalyptic number.

20688010 is an abundant number, since it is smaller than the sum of its proper divisors (22028150).

20688010 is a wasteful number, since it uses less digits than its factorization.

20688010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20688010 is about 4548.4074135899. The cubic root of 20688010 is about 274.5193145468.

The spelling of 20688010 in words is "twenty million, six hundred eighty-eight thousand, ten".