20934289 has 4 divisors (see below), whose sum is σ = 21199360. Its totient is φ = 20669220.

The previous prime is 20934281. The next prime is 20934323. The reversal of 20934289 is 98243902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20934289 - 2³ = 20934281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20934281) 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, 132417 + ... + 132574.

It is an arithmetic number, because the mean of its divisors is an integer number (5299840).

Almost surely, 2^20934289 is an apocalyptic number.

It is an amenable number.

20934289 is a deficient number, since it is larger than the sum of its proper divisors (265071).

20934289 is an equidigital number, since it uses as much as digits as its factorization.

20934289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265070.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20934289 is about 4575.4004196354. The cubic root of 20934289 is about 275.6043524176.

The spelling of 20934289 in words is "twenty million, nine hundred thirty-four thousand, two hundred eighty-nine".