20683133 has 4 divisors (see below), whose sum is σ = 20703900. Its totient is φ = 20662368.

The previous prime is 20683127. The next prime is 20683139. The reversal of 20683133 is 33138602.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20683127) and next prime (20683139).

It can be written as a sum of positive squares in 2 ways, for example, as 9746884 + 10936249 = 3122^2 + 3307^2 .

It is a cyclic number.

It is not a de Polignac number, because 20683133 - 2⁸ = 20682877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683139) 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, 8810 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (5175975).

Almost surely, 2^20683133 is an apocalyptic number.

It is an amenable number.

20683133 is a deficient number, since it is larger than the sum of its proper divisors (20767).

20683133 is a wasteful number, since it uses less digits than its factorization.

20683133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20766.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20683133 is about 4547.8712602711. The cubic root of 20683133 is about 274.4977410860.

The spelling of 20683133 in words is "twenty million, six hundred eighty-three thousand, one hundred thirty-three".