20214009 has 16 divisors (see below), whose sum is σ = 30037440. Its totient is φ = 13435200.

The previous prime is 20214001. The next prime is 20214013. The reversal of 20214009 is 90041202.

It is not a de Polignac number, because 20214009 - 2³ = 20214001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213982 and 20214000.

It is not an unprimeable number, because it can be changed into a prime (20214001) 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, 9894 + ... + 11760.

It is an arithmetic number, because the mean of its divisors is an integer number (1877340).

Almost surely, 2^20214009 is an apocalyptic number.

It is an amenable number.

20214009 is a deficient number, since it is larger than the sum of its proper divisors (9823431).

20214009 is a wasteful number, since it uses less digits than its factorization.

20214009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20214009 is about 4495.9992215302. Note that the first 3 decimals coincide. The cubic root of 20214009 is about 272.4065117114.

The spelling of 20214009 in words is "twenty million, two hundred fourteen thousand, nine".