20543453 has 8 divisors (see below), whose sum is σ = 23707008. Its totient is φ = 17437104.

The previous prime is 20543443. The next prime is 20543459. The reversal of 20543453 is 35434502.

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 20543453 - 2⁸ = 20543197 is a prime.

It is a super-2 number, since 2×20543453² = 844066922326418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13526 + ... + 14967.

It is an arithmetic number, because the mean of its divisors is an integer number (2963376).

Almost surely, 2^20543453 is an apocalyptic number.

It is an amenable number.

20543453 is a deficient number, since it is larger than the sum of its proper divisors (3163555).

20543453 is a wasteful number, since it uses less digits than its factorization.

20543453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28603.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20543453 is about 4532.4886100243. The cubic root of 20543453 is about 273.8784203177.

Adding to 20543453 its reverse (35434502), we get a palindrome (55977955).

The spelling of 20543453 in words is "twenty million, five hundred forty-three thousand, four hundred fifty-three".