20663466 has 32 divisors (see below), whose sum is σ = 44048448. Its totient is φ = 6439680.

The previous prime is 20663437. The next prime is 20663471. The reversal of 20663466 is 66436602.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17061 + ... + 18231.

It is an arithmetic number, because the mean of its divisors is an integer number (1376514).

Almost surely, 2^20663466 is an apocalyptic number.

20663466 is an abundant number, since it is smaller than the sum of its proper divisors (23384982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20663466 is a wasteful number, since it uses less digits than its factorization.

20663466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 20663466 is about 4545.7085256316. The cubic root of 20663466 is about 274.4107094761.

The spelling of 20663466 in words is "twenty million, six hundred sixty-three thousand, four hundred sixty-six".