20570112 has 140 divisors (see below), whose sum is σ = 63434976. Its totient is φ = 6635520.

The previous prime is 20570101. The next prime is 20570117. The reversal of 20570112 is 21107502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570117) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 663537 + ... + 663567.

Almost surely, 2^20570112 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 20570112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31717488).

20570112 is an abundant number, since it is smaller than the sum of its proper divisors (42864864).

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

20570112 is an frugal number, since it uses more digits than its factorization.

20570112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20570112 is about 4535.4285354308. The cubic root of 20570112 is about 273.9968387225.

Adding to 20570112 its reverse (21107502), we get a palindrome (41677614).

The spelling of 20570112 in words is "twenty million, five hundred seventy thousand, one hundred twelve".