20289853 has 8 divisors (see below), whose sum is σ = 21813120. Its totient is φ = 18812160.

The previous prime is 20289827. The next prime is 20289869. The reversal of 20289853 is 35898202.

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 20289853 - 2¹⁷ = 20158781 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 (20289803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10468 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (2726640).

Almost surely, 2^20289853 is an apocalyptic number.

It is an amenable number.

20289853 is a deficient number, since it is larger than the sum of its proper divisors (1523267).

20289853 is a wasteful number, since it uses less digits than its factorization.

20289853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22787.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 20289853 is about 4504.4259345670. The cubic root of 20289853 is about 272.7467809042.

It can be divided in two parts, 2028 and 9853, that added together give a square (11881 = 109²).

The spelling of 20289853 in words is "twenty million, two hundred eighty-nine thousand, eight hundred fifty-three".