20544663774 has 8 divisors (see below), whose sum is σ = 41089327560. Its totient is φ = 6848221256.

The previous prime is 20544663757. The next prime is 20544663817. The reversal of 20544663774 is 47736644502.

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

20544663774 is an admirable number.

It is a super-3 number, since 3×20544663774³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712055309 + ... + 1712055320.

It is an arithmetic number, because the mean of its divisors is an integer number (5136165945).

Almost surely, 2^20544663774 is an apocalyptic number.

20544663774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20544663774 is a wasteful number, since it uses less digits than its factorization.

20544663774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424110634.

The product of its (nonzero) digits is 3386880, while the sum is 48.

The spelling of 20544663774 in words is "twenty billion, five hundred forty-four million, six hundred sixty-three thousand, seven hundred seventy-four".