20246289 has 32 divisors (see below), whose sum is σ = 32219136. Its totient is φ = 11067840.

The previous prime is 20246243. The next prime is 20246293. The reversal of 20246289 is 98264202.

It is not a de Polignac number, because 20246289 - 2⁹ = 20245777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20246299) 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 31 ways as a sum of consecutive naturals, for example, 54984 + ... + 55350.

It is an arithmetic number, because the mean of its divisors is an integer number (1006848).

Almost surely, 2^20246289 is an apocalyptic number.

It is an amenable number.

20246289 is a deficient number, since it is larger than the sum of its proper divisors (11972847).

20246289 is a wasteful number, since it uses less digits than its factorization.

20246289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20246289 is about 4499.5876477740. The cubic root of 20246289 is about 272.5514376989.

The spelling of 20246289 in words is "twenty million, two hundred forty-six thousand, two hundred eighty-nine".