20570801 has 4 divisors (see below), whose sum is σ = 20588400. Its totient is φ = 20553204.

The previous prime is 20570789. The next prime is 20570821. The reversal of 20570801 is 10807502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20570801 - 2¹⁸ = 20308657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20570821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6911 + ... + 9428.

It is an arithmetic number, because the mean of its divisors is an integer number (5147100).

Almost surely, 2^20570801 is an apocalyptic number.

It is an amenable number.

20570801 is a deficient number, since it is larger than the sum of its proper divisors (17599).

20570801 is a wasteful number, since it uses less digits than its factorization.

20570801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17598.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 20570801 is about 4535.5044923360. The cubic root of 20570801 is about 273.9998978812. Note that the first 3 decimals are identical.

Adding to 20570801 its sum of digits (23), we get a cube (20570824 = 274³).

The spelling of 20570801 in words is "twenty million, five hundred seventy thousand, eight hundred one".