20504443760 has 40 divisors (see below), whose sum is σ = 47816920176. Its totient is φ = 8176988160.

The previous prime is 20504443667. The next prime is 20504443763. The reversal of 20504443760 is 6734440502.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20504443760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504443763) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 360689 + ... + 413648.

Almost surely, 2^20504443760 is an apocalyptic number.

20504443760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20504443760 is an abundant number, since it is smaller than the sum of its proper divisors (27312476416).

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

20504443760 is a wasteful number, since it uses less digits than its factorization.

20504443760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774681 (or 774675 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 20504443760 in words is "twenty billion, five hundred four million, four hundred forty-three thousand, seven hundred sixty".