20663030 has 16 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 8251392.

The previous prime is 20663017. The next prime is 20663047. The reversal of 20663030 is 3036602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20662993 and 20663011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6347 + ... + 9033.

It is an arithmetic number, because the mean of its divisors is an integer number (2328480).

Almost surely, 2^20663030 is an apocalyptic number.

20663030 is a deficient number, since it is larger than the sum of its proper divisors (16592650).

20663030 is a wasteful number, since it uses less digits than its factorization.

20663030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20663030 is about 4545.6605680583. The cubic root of 20663030 is about 274.4087794367.

Adding to 20663030 its reverse (3036602), we get a palindrome (23699632).

It can be divided in two parts, 206 and 63030, that added together give a palindrome (63236).

The spelling of 20663030 in words is "twenty million, six hundred sixty-three thousand, thirty".