20543473 has 8 divisors (see below), whose sum is σ = 21416192. Its totient is φ = 19687536.

The previous prime is 20543459. The next prime is 20543477. The reversal of 20543473 is 37434502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20543473 - 2⁹ = 20542961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20543477) 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, 1665 + ... + 6622.

It is an arithmetic number, because the mean of its divisors is an integer number (2677024).

Almost surely, 2^20543473 is an apocalyptic number.

It is an amenable number.

20543473 is a deficient number, since it is larger than the sum of its proper divisors (872719).

20543473 is an equidigital number, since it uses as much as digits as its factorization.

20543473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8391.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 20543473 is about 4532.4908163172. The cubic root of 20543473 is about 273.8785091954.

Adding to 20543473 its reverse (37434502), we get a palindrome (57977975).

The spelling of 20543473 in words is "twenty million, five hundred forty-three thousand, four hundred seventy-three".