20193543 has 12 divisors (see below), whose sum is σ = 30249128. Its totient is φ = 13462200.

The previous prime is 20193533. The next prime is 20193559. The reversal of 20193543 is 34539102.

It is not a de Polignac number, because 20193543 - 2¹⁰ = 20192519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20193533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41308 + ... + 41793.

Almost surely, 2^20193543 is an apocalyptic number.

20193543 is a deficient number, since it is larger than the sum of its proper divisors (10055585).

20193543 is an frugal number, since it uses more digits than its factorization.

20193543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83116 (or 83104 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20193543 is about 4493.7226216134. The cubic root of 20193543 is about 272.3145465426.

It can be divided in two parts, 20193 and 543, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20193543 in words is "twenty million, one hundred ninety-three thousand, five hundred forty-three".