20663283 has 8 divisors (see below), whose sum is σ = 28501200. Its totient is φ = 13300448.

The previous prime is 20663273. The next prime is 20663309. The reversal of 20663283 is 38236602.

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 20663283 - 2¹² = 20659187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20663283.

It is not an unprimeable number, because it can be changed into a prime (20663213) 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, 118668 + ... + 118841.

It is an arithmetic number, because the mean of its divisors is an integer number (3562650).

Almost surely, 2^20663283 is an apocalyptic number.

20663283 is a deficient number, since it is larger than the sum of its proper divisors (7837917).

20663283 is a wasteful number, since it uses less digits than its factorization.

20663283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237541.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20663283 is about 4545.6883967118. The cubic root of 20663283 is about 274.4098993941.

Adding to 20663283 its reverse (38236602), we get a palindrome (58899885).

The spelling of 20663283 in words is "twenty million, six hundred sixty-three thousand, two hundred eighty-three".