20570011 has 8 divisors (see below), whose sum is σ = 25645824. Its totient is φ = 16028520.

The previous prime is 20569999. The next prime is 20570021. The reversal of 20570011 is 11007502.

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 20570011 - 2¹⁵ = 20537243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20570021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133495 + ... + 133648.

It is an arithmetic number, because the mean of its divisors is an integer number (3205728).

Almost surely, 2^20570011 is an apocalyptic number.

20570011 is a deficient number, since it is larger than the sum of its proper divisors (5075813).

20570011 is a wasteful number, since it uses less digits than its factorization.

20570011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267161.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 20570011 is about 4535.4174008574. The cubic root of 20570011 is about 273.9963902769.

Adding to 20570011 its reverse (11007502), we get a palindrome (31577513).

The spelling of 20570011 in words is "twenty million, five hundred seventy thousand, eleven".