20540544005 has 4 divisors (see below), whose sum is σ = 24648652812. Its totient is φ = 16432435200.

The previous prime is 20540543999. The next prime is 20540544041. The reversal of 20540544005 is 50044504502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8019381601 + 12521162404 = 89551^2 + 111898^2 .

It is not a de Polignac number, because 20540544005 - 2²⁴ = 20523766789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054054396 + ... + 2054054405.

It is an arithmetic number, because the mean of its divisors is an integer number (6162163203).

Almost surely, 2^20540544005 is an apocalyptic number.

It is an amenable number.

20540544005 is a deficient number, since it is larger than the sum of its proper divisors (4108108807).

20540544005 is an equidigital number, since it uses as much as digits as its factorization.

20540544005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108108806.

The product of its (nonzero) digits is 16000, while the sum is 29.

The spelling of 20540544005 in words is "twenty billion, five hundred forty million, five hundred forty-four thousand, five".