20284163 has 4 divisors (see below), whose sum is σ = 20294400. Its totient is φ = 20273928.

The previous prime is 20284151. The next prime is 20284181. The reversal of 20284163 is 36148202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20284163 - 2¹⁰ = 20283139 is a prime.

It is a super-2 number, since 2×20284163² = 822894537221138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20284193) 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, 1088 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (5073600).

Almost surely, 2^20284163 is an apocalyptic number.

20284163 is a deficient number, since it is larger than the sum of its proper divisors (10237).

20284163 is an equidigital number, since it uses as much as digits as its factorization.

20284163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20284163 is about 4503.7942892632. The cubic root of 20284163 is about 272.7212825385.

The spelling of 20284163 in words is "twenty million, two hundred eighty-four thousand, one hundred sixty-three".