20466287 has 8 divisors (see below), whose sum is σ = 21638400. Its totient is φ = 19303704.

The previous prime is 20466269. The next prime is 20466301. The reversal of 20466287 is 78266402.

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 20466287 - 2¹² = 20462191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466227) 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 7 ways as a sum of consecutive naturals, for example, 2288 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^20466287 is an apocalyptic number.

20466287 is a deficient number, since it is larger than the sum of its proper divisors (1172113).

20466287 is a wasteful number, since it uses less digits than its factorization.

20466287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20466287 is about 4523.9680591269. The cubic root of 20466287 is about 273.5350729898.

The spelling of 20466287 in words is "twenty million, four hundred sixty-six thousand, two hundred eighty-seven".