20040539 has 8 divisors (see below), whose sum is σ = 20748672. Its totient is φ = 19336320.

The previous prime is 20040533. The next prime is 20040547. The reversal of 20040539 is 93504002.

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 20040539 - 2⁴ = 20040523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20040533) 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, 12677 + ... + 14169.

It is an arithmetic number, because the mean of its divisors is an integer number (2593584).

Almost surely, 2^20040539 is an apocalyptic number.

20040539 is a deficient number, since it is larger than the sum of its proper divisors (708133).

20040539 is a wasteful number, since it uses less digits than its factorization.

20040539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20040539 is about 4476.6660585753. Note that the first 3 decimals coincide. The cubic root of 20040539 is about 271.6250375111.

The spelling of 20040539 in words is "twenty million, forty thousand, five hundred thirty-nine".