20539011 has 4 divisors (see below), whose sum is σ = 27385352. Its totient is φ = 13692672.

The previous prime is 20539003. The next prime is 20539031. The reversal of 20539011 is 11093502.

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

It is not a de Polignac number, because 20539011 - 2³ = 20539003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20539031) 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, 3423166 + ... + 3423171.

It is an arithmetic number, because the mean of its divisors is an integer number (6846338).

Almost surely, 2^20539011 is an apocalyptic number.

20539011 is a deficient number, since it is larger than the sum of its proper divisors (6846341).

20539011 is an equidigital number, since it uses as much as digits as its factorization.

20539011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846340.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 20539011 is about 4531.9985657544. The cubic root of 20539011 is about 273.8586791437.

The spelling of 20539011 in words is "twenty million, five hundred thirty-nine thousand, eleven".