20570113 has 8 divisors (see below), whose sum is σ = 21186368. Its totient is φ = 19957104.

The previous prime is 20570101. The next prime is 20570117. The reversal of 20570113 is 31107502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20570113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20570117) 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, 18820 + ... + 19882.

It is an arithmetic number, because the mean of its divisors is an integer number (2648296).

It is a Proth number, since it is equal to 2511 ⋅ 2¹³ + 1 and 2511 < 2¹³.

Almost surely, 2^20570113 is an apocalyptic number.

It is an amenable number.

20570113 is a deficient number, since it is larger than the sum of its proper divisors (616255).

20570113 is a wasteful number, since it uses less digits than its factorization.

20570113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 20570113 is about 4535.4286456740. The cubic root of 20570113 is about 273.9968431625.

Adding to 20570113 its reverse (31107502), we get a palindrome (51677615).

The spelling of 20570113 in words is "twenty million, five hundred seventy thousand, one hundred thirteen".