20042239 has 8 divisors (see below), whose sum is σ = 22958208. Its totient is φ = 17139480.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042239 is 93224002.

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 20042239 - 2¹¹ = 20040191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042249) 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, 204 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (2869776).

Almost surely, 2^20042239 is an apocalyptic number.

20042239 is a deficient number, since it is larger than the sum of its proper divisors (2915969).

20042239 is an equidigital number, since it uses as much as digits as its factorization.

20042239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20042239 is about 4476.8559279923. The cubic root of 20042239 is about 271.6327177688.

The spelling of 20042239 in words is "twenty million, forty-two thousand, two hundred thirty-nine".