20237842 has 8 divisors (see below), whose sum is σ = 30438000. Its totient is φ = 10091844.

The previous prime is 20237839. The next prime is 20237849. The reversal of 20237842 is 24873202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20237842.

It is not an unprimeable number, because it can be changed into a prime (20237849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12592 + ... + 14107.

It is an arithmetic number, because the mean of its divisors is an integer number (3804750).

Almost surely, 2^20237842 is an apocalyptic number.

20237842 is a deficient number, since it is larger than the sum of its proper divisors (10200158).

20237842 is a wasteful number, since it uses less digits than its factorization.

20237842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27080.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20237842 is about 4498.6489082835. The cubic root of 20237842 is about 272.5135284926.

The spelling of 20237842 in words is "twenty million, two hundred thirty-seven thousand, eight hundred forty-two".