240020321 has 12 divisors (see below), whose sum is σ = 249044400. Its totient is φ = 231313320.

The previous prime is 240020311. The next prime is 240020323. The reversal of 240020321 is 123020042.

It is not a de Polignac number, because 240020321 - 2¹⁴ = 240003937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240020296 and 240020305.

It is not an unprimeable number, because it can be changed into a prime (240020323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363890 + ... + 364548.

It is an arithmetic number, because the mean of its divisors is an integer number (20753700).

Almost surely, 2^240020321 is an apocalyptic number.

It is an amenable number.

240020321 is a deficient number, since it is larger than the sum of its proper divisors (9024079).

240020321 is an equidigital number, since it uses as much as digits as its factorization.

240020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 240020321 is about 15492.5892284021. The cubic root of 240020321 is about 621.4640401601.

Adding to 240020321 its reverse (123020042), we get a palindrome (363040363).

The spelling of 240020321 in words is "two hundred forty million, twenty thousand, three hundred twenty-one".