20663363 has 8 divisors (see below), whose sum is σ = 23642880. Its totient is φ = 17690760.

The previous prime is 20663359. The next prime is 20663371. The reversal of 20663363 is 36336602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20663363 - 2² = 20663359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20663333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10058 + ... + 11936.

It is an arithmetic number, because the mean of its divisors is an integer number (2955360).

Almost surely, 2^20663363 is an apocalyptic number.

20663363 is a deficient number, since it is larger than the sum of its proper divisors (2979517).

20663363 is a wasteful number, since it uses less digits than its factorization.

20663363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457.

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 20663363 is about 4545.6971962505. The cubic root of 20663363 is about 274.4102535289.

Adding to 20663363 its reverse (36336602), we get a palindrome (56999965).

The spelling of 20663363 in words is "twenty million, six hundred sixty-three thousand, three hundred sixty-three".