20663276 has 12 divisors (see below), whose sum is σ = 36221640. Its totient is φ = 10314240.

The previous prime is 20663273. The next prime is 20663309. The reversal of 20663276 is 67236602.

It is not an unprimeable number, because it can be changed into a prime (20663273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (3018470).

Almost surely, 2^20663276 is an apocalyptic number.

It is an amenable number.

20663276 is a deficient number, since it is larger than the sum of its proper divisors (15558364).

20663276 is a wasteful number, since it uses less digits than its factorization.

20663276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8704 (or 8702 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20663276 is about 4545.6876267513. The cubic root of 20663276 is about 274.4098684073.

Adding to 20663276 its reverse (67236602), we get a palindrome (87899878).

The spelling of 20663276 in words is "twenty million, six hundred sixty-three thousand, two hundred seventy-six".