20032784680 has 16 divisors (see below), whose sum is σ = 45073765620. Its totient is φ = 8013113856.

The previous prime is 20032784677. The next prime is 20032784693. The reversal of 20032784680 is 8648723002.

It can be written as a sum of positive squares in 2 ways, for example, as 18116621604 + 1916163076 = 134598^2 + 43774^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 500819617 = 20032784680 / (2 + 0 + 0 + 3 + 2 + 7 + 8 + 4 + 6 + 8 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250409769 + ... + 250409848.

Almost surely, 2^20032784680 is an apocalyptic number.

20032784680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20032784680 is an abundant number, since it is smaller than the sum of its proper divisors (25040980940).

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

20032784680 is a wasteful number, since it uses less digits than its factorization.

20032784680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500819628 (or 500819624 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 20032784680 in words is "twenty billion, thirty-two million, seven hundred eighty-four thousand, six hundred eighty".