20657112 has 64 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 5756160.

The previous prime is 20657107. The next prime is 20657141. The reversal of 20657112 is 21175602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5389 + ... + 8387.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^20657112 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 20657112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240000).

20657112 is an abundant number, since it is smaller than the sum of its proper divisors (39822888).

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

20657112 is a wasteful number, since it uses less digits than its factorization.

20657112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 20657112 is about 4545.0095709470. The cubic root of 20657112 is about 274.3825795648.

The spelling of 20657112 in words is "twenty million, six hundred fifty-seven thousand, one hundred twelve".