20676220 has 24 divisors (see below), whose sum is σ = 43845984. Its totient is φ = 8189376.

The previous prime is 20676209. The next prime is 20676221. The reversal of 20676220 is 2267602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20676221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2959 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (1826916).

Almost surely, 2^20676220 is an apocalyptic number.

20676220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20676220 is an abundant number, since it is smaller than the sum of its proper divisors (23169764).

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

20676220 is a wasteful number, since it uses less digits than its factorization.

20676220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10149 (or 10147 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20676220 is about 4547.1111708424. Note that the first 4 decimals coincide. The cubic root of 20676220 is about 274.4671555466.

The spelling of 20676220 in words is "twenty million, six hundred seventy-six thousand, two hundred twenty".