20052539 has 4 divisors (see below), whose sum is σ = 21595056. Its totient is φ = 18510024.

The previous prime is 20052521. The next prime is 20052541. The reversal of 20052539 is 93525002.

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

It is not a de Polignac number, because 20052539 - 2⁸ = 20052283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20052559) 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, 771239 + ... + 771264.

It is an arithmetic number, because the mean of its divisors is an integer number (5398764).

Almost surely, 2^20052539 is an apocalyptic number.

20052539 is a deficient number, since it is larger than the sum of its proper divisors (1542517).

20052539 is a wasteful number, since it uses less digits than its factorization.

20052539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542516.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 20052539 is about 4478.0061411302. The cubic root of 20052539 is about 271.6792418098.

The spelling of 20052539 in words is "twenty million, fifty-two thousand, five hundred thirty-nine".