20570512 has 40 divisors (see below), whose sum is σ = 42229440. Its totient is φ = 9690240.

The previous prime is 20570497. The next prime is 20570549. The reversal of 20570512 is 21507502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19437 + ... + 20467.

It is an arithmetic number, because the mean of its divisors is an integer number (1055736).

Almost surely, 2^20570512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20570512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21114720).

20570512 is an abundant number, since it is smaller than the sum of its proper divisors (21658928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20570512 is a wasteful number, since it uses less digits than its factorization.

20570512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20570512 is about 4535.4726324827. The cubic root of 20570512 is about 273.9986147301.

The spelling of 20570512 in words is "twenty million, five hundred seventy thousand, five hundred twelve".