20676543 has 4 divisors (see below), whose sum is σ = 27568728. Its totient is φ = 13784360.

The previous prime is 20676533. The next prime is 20676547. The reversal of 20676543 is 34567602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20676543 - 2⁴ = 20676527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20676547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3446088 + ... + 3446093.

It is an arithmetic number, because the mean of its divisors is an integer number (6892182).

Almost surely, 2^20676543 is an apocalyptic number.

20676543 is a deficient number, since it is larger than the sum of its proper divisors (6892185).

20676543 is an equidigital number, since it uses as much as digits as its factorization.

20676543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892184.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20676543 is about 4547.1466877593. The cubic root of 20676543 is about 274.4685847638.

The spelling of 20676543 in words is "twenty million, six hundred seventy-six thousand, five hundred forty-three".