20542683 has 8 divisors (see below), whose sum is σ = 31303168. Its totient is φ = 11738664.

The previous prime is 20542673. The next prime is 20542729. The reversal of 20542683 is 38624502.

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

It is not a de Polignac number, because 20542683 - 2⁵ = 20542651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20542683.

It is not an unprimeable number, because it can be changed into a prime (20542603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489091 + ... + 489132.

It is an arithmetic number, because the mean of its divisors is an integer number (3912896).

Almost surely, 2^20542683 is an apocalyptic number.

20542683 is a deficient number, since it is larger than the sum of its proper divisors (10760485).

20542683 is an equidigital number, since it uses as much as digits as its factorization.

20542683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978233.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20542683 is about 4532.4036669299. The cubic root of 20542683 is about 273.8749984811.

The spelling of 20542683 in words is "twenty million, five hundred forty-two thousand, six hundred eighty-three".