20663350 has 12 divisors (see below), whose sum is σ = 38433924. Its totient is φ = 8265320.

The previous prime is 20663339. The next prime is 20663351. The reversal of 20663350 is 5336602.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206584 + ... + 206683.

It is an arithmetic number, because the mean of its divisors is an integer number (3202827).

Almost surely, 2^20663350 is an apocalyptic number.

20663350 is a deficient number, since it is larger than the sum of its proper divisors (17770574).

20663350 is a wasteful number, since it uses less digits than its factorization.

20663350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413279 (or 413274 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 20663350 is about 4545.6957663266. The cubic root of 20663350 is about 274.4101959821.

Adding to 20663350 its reverse (5336602), we get a palindrome (25999952).

The spelling of 20663350 in words is "twenty million, six hundred sixty-three thousand, three hundred fifty".