20664333 has 24 divisors (see below), whose sum is σ = 31876416. Its totient is φ = 12854400.

The previous prime is 20664313. The next prime is 20664353. The reversal of 20664333 is 33346602.

It is an interprime number because it is at equal distance from previous prime (20664313) and next prime (20664353).

It is not a de Polignac number, because 20664333 - 2¹⁰ = 20663309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20664297 and 20664306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19528 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (1328184).

Almost surely, 2^20664333 is an apocalyptic number.

It is an amenable number.

20664333 is a deficient number, since it is larger than the sum of its proper divisors (11212083).

20664333 is a wasteful number, since it uses less digits than its factorization.

20664333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

The square root of 20664333 is about 4545.8038893027. The cubic root of 20664333 is about 274.4145473408.

The spelling of 20664333 in words is "twenty million, six hundred sixty-four thousand, three hundred thirty-three".