20683121 has 4 divisors (see below), whose sum is σ = 20884032. Its totient is φ = 20482212.

The previous prime is 20683063. The next prime is 20683123. The reversal of 20683121 is 12138602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20683121 - 2⁶ = 20683057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20683123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100301 + ... + 100506.

It is an arithmetic number, because the mean of its divisors is an integer number (5221008).

Almost surely, 2^20683121 is an apocalyptic number.

It is an amenable number.

20683121 is a deficient number, since it is larger than the sum of its proper divisors (200911).

20683121 is a wasteful number, since it uses less digits than its factorization.

20683121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200910.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20683121 is about 4547.8699409724. The cubic root of 20683121 is about 274.4976879997.

The spelling of 20683121 in words is "twenty million, six hundred eighty-three thousand, one hundred twenty-one".