20540044389 has 8 divisors (see below), whose sum is σ = 27389525472. Its totient is φ = 13691963120.

The previous prime is 20540044381. The next prime is 20540044417. The reversal of 20540044389 is 98344004502.

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

It is a cyclic number.

It is not a de Polignac number, because 20540044389 - 2³ = 20540044381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540044381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315222 + ... + 374759.

It is an arithmetic number, because the mean of its divisors is an integer number (3423690684).

Almost surely, 2^20540044389 is an apocalyptic number.

It is an amenable number.

20540044389 is a deficient number, since it is larger than the sum of its proper divisors (6849481083).

20540044389 is an equidigital number, since it uses as much as digits as its factorization.

20540044389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699907.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 20540044389 in words is "twenty billion, five hundred forty million, forty-four thousand, three hundred eighty-nine".