20573570 has 16 divisors (see below), whose sum is σ = 39211128. Its totient is φ = 7745280.

The previous prime is 20573549. The next prime is 20573573. The reversal of 20573570 is 7537502.

It can be written as a sum of positive squares in 4 ways, for example, as 13126129 + 7447441 = 3623^2 + 2729^2 .

It is not an unprimeable number, because it can be changed into a prime (20573573) 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 7 ways as a sum of consecutive naturals, for example, 60341 + ... + 60680.

Almost surely, 2^20573570 is an apocalyptic number.

20573570 is a deficient number, since it is larger than the sum of its proper divisors (18637558).

20573570 is a wasteful number, since it uses less digits than its factorization.

20573570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121045.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20573570 is about 4535.8097402779. The cubic root of 20573570 is about 274.0121915473.

The spelling of 20573570 in words is "twenty million, five hundred seventy-three thousand, five hundred seventy".