20430663 has 8 divisors (see below), whose sum is σ = 29717376. Its totient is φ = 12382200.

The previous prime is 20430659. The next prime is 20430679. The reversal of 20430663 is 36603402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20430663 - 2² = 20430659 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309523 + ... + 309588.

It is an arithmetic number, because the mean of its divisors is an integer number (3714672).

Almost surely, 2^20430663 is an apocalyptic number.

20430663 is a deficient number, since it is larger than the sum of its proper divisors (9286713).

20430663 is a wasteful number, since it uses less digits than its factorization.

20430663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619125.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20430663 is about 4520.0290928267. The cubic root of 20430663 is about 273.3762740719.

The spelling of 20430663 in words is "twenty million, four hundred thirty thousand, six hundred sixty-three".