20663433 has 24 divisors (see below), whose sum is σ = 34235136. Its totient is φ = 11764800.

The previous prime is 20663417. The next prime is 20663437. The reversal of 20663433 is 33436602.

20663433 is a `hidden beast` number, since 20 + 6 + 634 + 3 + 3 = 666.

It is not a de Polignac number, because 20663433 - 2⁴ = 20663417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20663397 and 20663406.

It is not an unprimeable number, because it can be changed into a prime (20663437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26773 + ... + 27533.

It is an arithmetic number, because the mean of its divisors is an integer number (1426464).

Almost surely, 2^20663433 is an apocalyptic number.

It is an amenable number.

20663433 is a deficient number, since it is larger than the sum of its proper divisors (13571703).

20663433 is a wasteful number, since it uses less digits than its factorization.

20663433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205 (or 1202 counting only the distinct ones).

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

The square root of 20663433 is about 4545.7048958330. The cubic root of 20663433 is about 274.4105633961.

The spelling of 20663433 in words is "twenty million, six hundred sixty-three thousand, four hundred thirty-three".