20543083 has 4 divisors (see below), whose sum is σ = 22410648. Its totient is φ = 18675520.

The previous prime is 20543063. The next prime is 20543093. The reversal of 20543083 is 38034502.

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 20543083 - 2⁵ = 20543051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20543063) 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, 933766 + ... + 933787.

It is an arithmetic number, because the mean of its divisors is an integer number (5602662).

Almost surely, 2^20543083 is an apocalyptic number.

20543083 is a deficient number, since it is larger than the sum of its proper divisors (1867565).

20543083 is a wasteful number, since it uses less digits than its factorization.

20543083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867564.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20543083 is about 4532.4477934114. The cubic root of 20543083 is about 273.8767760692.

Adding to 20543083 its reverse (38034502), we get a palindrome (58577585).

The spelling of 20543083 in words is "twenty million, five hundred forty-three thousand, eighty-three".