20570481 has 24 divisors (see below), whose sum is σ = 30611880. Its totient is φ = 13305600.

The previous prime is 20570477. The next prime is 20570497. The reversal of 20570481 is 18407502.

It can be written as a sum of positive squares in 4 ways, for example, as 3629025 + 16941456 = 1905^2 + 4116^2 .

It is not a de Polignac number, because 20570481 - 2² = 20570477 is a prime.

It is a super-2 number, since 2×20570481² = 846289377142722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20570401) 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 23 ways as a sum of consecutive naturals, for example, 48651 + ... + 49071.

It is an arithmetic number, because the mean of its divisors is an integer number (1275495).

Almost surely, 2^20570481 is an apocalyptic number.

It is an amenable number.

20570481 is a deficient number, since it is larger than the sum of its proper divisors (10041399).

20570481 is a wasteful number, since it uses less digits than its factorization.

20570481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20570481 is about 4535.4692149765. The cubic root of 20570481 is about 273.9984770903.

Adding to 20570481 its reverse (18407502), we get a palindrome (38977983).

The spelling of 20570481 in words is "twenty million, five hundred seventy thousand, four hundred eighty-one".