20240539 has 4 divisors (see below), whose sum is σ = 22080600. Its totient is φ = 18400480.

The previous prime is 20240533. The next prime is 20240543. The reversal of 20240539 is 93504202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20240539 - 2³ = 20240531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20240531) 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, 920014 + ... + 920035.

It is an arithmetic number, because the mean of its divisors is an integer number (5520150).

Almost surely, 2^20240539 is an apocalyptic number.

20240539 is a deficient number, since it is larger than the sum of its proper divisors (1840061).

20240539 is a wasteful number, since it uses less digits than its factorization.

20240539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840060.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20240539 is about 4498.9486549637. The cubic root of 20240539 is about 272.5256334779.

The spelling of 20240539 in words is "twenty million, two hundred forty thousand, five hundred thirty-nine".