20842330 has 8 divisors (see below), whose sum is σ = 37516212. Its totient is φ = 8336928.

The previous prime is 20842319. The next prime is 20842337. The reversal of 20842330 is 3324802.

It can be written as a sum of positive squares in 2 ways, for example, as 19000881 + 1841449 = 4359^2 + 1357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20842337) 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 3 ways as a sum of consecutive naturals, for example, 1042107 + ... + 1042126.

Almost surely, 2^20842330 is an apocalyptic number.

20842330 is a deficient number, since it is larger than the sum of its proper divisors (16673882).

20842330 is a wasteful number, since it uses less digits than its factorization.

20842330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084240.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20842330 is about 4565.3400749561. The cubic root of 20842330 is about 275.2002068262.

The spelling of 20842330 in words is "twenty million, eight hundred forty-two thousand, three hundred thirty".