20453543 has 8 divisors (see below), whose sum is σ = 22438416. Its totient is φ = 18489600.

The previous prime is 20453539. The next prime is 20453549. The reversal of 20453543 is 34535402.

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 20453543 - 2² = 20453539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453549) 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 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (2804802).

Almost surely, 2^20453543 is an apocalyptic number.

20453543 is a deficient number, since it is larger than the sum of its proper divisors (1984873).

20453543 is a wasteful number, since it uses less digits than its factorization.

20453543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10465.

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

The square root of 20453543 is about 4522.5593417887. The cubic root of 20453543 is about 273.4782860281.

Adding to 20453543 its reverse (34535402), we get a palindrome (54988945).

The spelling of 20453543 in words is "twenty million, four hundred fifty-three thousand, five hundred forty-three".