20543568 has 20 divisors (see below), whose sum is σ = 53071008. Its totient is φ = 6847840.

The previous prime is 20543539. The next prime is 20543569. The reversal of 20543568 is 86534502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543569) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 213948 + ... + 214043.

Almost surely, 2^20543568 is an apocalyptic number.

It is an amenable number.

20543568 is an abundant number, since it is smaller than the sum of its proper divisors (32527440).

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

20543568 is a wasteful number, since it uses less digits than its factorization.

20543568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428002 (or 427996 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 20543568 is about 4532.5012961940. The cubic root of 20543568 is about 273.8789313638.

The spelling of 20543568 in words is "twenty million, five hundred forty-three thousand, five hundred sixty-eight".