20240239 has 4 divisors (see below), whose sum is σ = 20250424. Its totient is φ = 20230056.

The previous prime is 20240219. The next prime is 20240257. The reversal of 20240239 is 93204202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20240239 - 2⁹ = 20239727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20240219) 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, 1032 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (5062606).

Almost surely, 2^20240239 is an apocalyptic number.

20240239 is a deficient number, since it is larger than the sum of its proper divisors (10185).

20240239 is an equidigital number, since it uses as much as digits as its factorization.

20240239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184.

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

The square root of 20240239 is about 4498.9153137173. The cubic root of 20240239 is about 272.5242870366.

The spelling of 20240239 in words is "twenty million, two hundred forty thousand, two hundred thirty-nine".