20286049 has 24 divisors (see below), whose sum is σ = 25411968. Its totient is φ = 16134720.

The previous prime is 20286031. The next prime is 20286073. The reversal of 20286049 is 94068202.

It is not a de Polignac number, because 20286049 - 2⁵ = 20286017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20286049.

It is not an unprimeable number, because it can be changed into a prime (20286449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285684 + ... + 285754.

It is an arithmetic number, because the mean of its divisors is an integer number (1058832).

Almost surely, 2^20286049 is an apocalyptic number.

It is an amenable number.

20286049 is a deficient number, since it is larger than the sum of its proper divisors (5125919).

20286049 is an frugal number, since it uses more digits than its factorization.

20286049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20286049 is about 4504.0036634088. The cubic root of 20286049 is about 272.7297347219.

The spelling of 20286049 in words is "twenty million, two hundred eighty-six thousand, forty-nine".