20066543 has 8 divisors (see below), whose sum is σ = 23553312. Its totient is φ = 16734816.

The previous prime is 20066539. The next prime is 20066561. The reversal of 20066543 is 34566002.

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

It is not a de Polignac number, because 20066543 - 2² = 20066539 is a prime.

It is a super-2 number, since 2×20066543² = 805332295941698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38480 + ... + 38997.

It is an arithmetic number, because the mean of its divisors is an integer number (2944164).

Almost surely, 2^20066543 is an apocalyptic number.

20066543 is a deficient number, since it is larger than the sum of its proper divisors (3486769).

20066543 is an equidigital number, since it uses as much as digits as its factorization.

20066543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77521.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20066543 is about 4479.5695105668. The cubic root of 20066543 is about 271.7424708899.

The spelling of 20066543 in words is "twenty million, sixty-six thousand, five hundred forty-three".