20543112 has 32 divisors (see below), whose sum is σ = 57064800. Its totient is φ = 6847632.

The previous prime is 20543093. The next prime is 20543119. The reversal of 20543112 is 21134502.

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

It is not an unprimeable number, because it can be changed into a prime (20543119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47338 + ... + 47769.

It is an arithmetic number, because the mean of its divisors is an integer number (1783275).

Almost surely, 2^20543112 is an apocalyptic number.

It is an amenable number.

20543112 is an abundant number, since it is smaller than the sum of its proper divisors (36521688).

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

20543112 is a wasteful number, since it uses less digits than its factorization.

20543112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95122 (or 95112 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20543112 is about 4532.4509925646. The cubic root of 20543112 is about 273.8769049434.

Adding to 20543112 its reverse (21134502), we get a palindrome (41677614).

The spelling of 20543112 in words is "twenty million, five hundred forty-three thousand, one hundred twelve".