20543466 has 16 divisors (see below), whose sum is σ = 41150304. Its totient is φ = 6837264.

The previous prime is 20543459. The next prime is 20543477. The reversal of 20543466 is 66434502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (2571894).

Almost surely, 2^20543466 is an apocalyptic number.

20543466 is an abundant number, since it is smaller than the sum of its proper divisors (20606838).

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

20543466 is a wasteful number, since it uses less digits than its factorization.

20543466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 20543466 is about 4532.4900441148. The cubic root of 20543466 is about 273.8784780882.

Adding to 20543466 its reverse (66434502), we get a palindrome (86977968).

The spelling of 20543466 in words is "twenty million, five hundred forty-three thousand, four hundred sixty-six".