20570451 has 16 divisors (see below), whose sum is σ = 30334080. Its totient is φ = 12294720.

The previous prime is 20570449. The next prime is 20570467. The reversal of 20570451 is 15407502.

It is not a de Polignac number, because 20570451 - 2¹ = 20570449 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1861 + ... + 6678.

It is an arithmetic number, because the mean of its divisors is an integer number (1895880).

Almost surely, 2^20570451 is an apocalyptic number.

20570451 is a deficient number, since it is larger than the sum of its proper divisors (9763629).

20570451 is a wasteful number, since it uses less digits than its factorization.

20570451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20570451 is about 4535.4659077100. The cubic root of 20570451 is about 273.9983438904.

Adding to 20570451 its reverse (15407502), we get a palindrome (35977953).

The spelling of 20570451 in words is "twenty million, five hundred seventy thousand, four hundred fifty-one".