20056541 has 4 divisors (see below), whose sum is σ = 20065500. Its totient is φ = 20047584.

The previous prime is 20056523. The next prime is 20056559. The reversal of 20056541 is 14565002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14565002 = 2 ⋅7282501.

It is an interprime number because it is at equal distance from previous prime (20056523) and next prime (20056559).

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 12630916 = 2725^2 + 3554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20056541 - 2²² = 15862237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056511) 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, 2135 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (5016375).

Almost surely, 2^20056541 is an apocalyptic number.

It is an amenable number.

20056541 is a deficient number, since it is larger than the sum of its proper divisors (8959).

20056541 is an equidigital number, since it uses as much as digits as its factorization.

20056541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8958.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20056541 is about 4478.4529694974. The cubic root of 20056541 is about 271.6973141348.

The spelling of 20056541 in words is "twenty million, fifty-six thousand, five hundred forty-one".