20570673 has 16 divisors (see below), whose sum is σ = 28988480. Its totient is φ = 12939264.

The previous prime is 20570653. The next prime is 20570677. The reversal of 20570673 is 37607502.

It is not a de Polignac number, because 20570673 - 2⁶ = 20570609 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20570673.

It is not an unprimeable number, because it can be changed into a prime (20570677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17265 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (1811780).

Almost surely, 2^20570673 is an apocalyptic number.

It is an amenable number.

20570673 is a deficient number, since it is larger than the sum of its proper divisors (8417807).

20570673 is a wasteful number, since it uses less digits than its factorization.

20570673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 20570673 is about 4535.4903814251. The cubic root of 20570673 is about 273.9993295666. Note that the first 3 decimals are identical.

The spelling of 20570673 in words is "twenty million, five hundred seventy thousand, six hundred seventy-three".