20570470 has 8 divisors (see below), whose sum is σ = 37026864. Its totient is φ = 8228184.

The previous prime is 20570467. The next prime is 20570477. The reversal of 20570470 is 7407502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570477) 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, 1028514 + ... + 1028533.

It is an arithmetic number, because the mean of its divisors is an integer number (4628358).

Almost surely, 2^20570470 is an apocalyptic number.

20570470 is a deficient number, since it is larger than the sum of its proper divisors (16456394).

20570470 is a wasteful number, since it uses less digits than its factorization.

20570470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057054.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20570470 is about 4535.4680023124. The cubic root of 20570470 is about 273.9984282503.

Adding to 20570470 its reverse (7407502), we get a palindrome (27977972).

The spelling of 20570470 in words is "twenty million, five hundred seventy thousand, four hundred seventy".