20543064 has 32 divisors (see below), whose sum is σ = 51497520. Its totient is φ = 6829056.

The previous prime is 20543063. The next prime is 20543093. The reversal of 20543064 is 46034502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10032 + ... + 11904.

Almost surely, 2^20543064 is an apocalyptic number.

20543064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20543064 is an abundant number, since it is smaller than the sum of its proper divisors (30954456).

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

20543064 is a wasteful number, since it uses less digits than its factorization.

20543064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20543064 is about 4532.4456974133. The cubic root of 20543064 is about 273.8766916343.

Adding to 20543064 its reverse (46034502), we get a palindrome (66577566).

The spelling of 20543064 in words is "twenty million, five hundred forty-three thousand, sixty-four".