20782524673 has 4 divisors (see below), whose sum is σ = 20789701380. Its totient is φ = 20775347968.

The previous prime is 20782524583. The next prime is 20782524677. The reversal of 20782524673 is 37642528702.

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 12506619889 + 8275904784 = 111833^2 + 90972^2 .

It is a cyclic number.

It is not a de Polignac number, because 20782524673 - 2¹³ = 20782516481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20782524677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3584008 + ... + 3589801.

It is an arithmetic number, because the mean of its divisors is an integer number (5197425345).

Almost surely, 2^20782524673 is an apocalyptic number.

It is an amenable number.

20782524673 is a deficient number, since it is larger than the sum of its proper divisors (7176707).

20782524673 is an equidigital number, since it uses as much as digits as its factorization.

20782524673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176706.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 20782524673 in words is "twenty billion, seven hundred eighty-two million, five hundred twenty-four thousand, six hundred seventy-three".