20805262484 has 6 divisors (see below), whose sum is σ = 36409209354. Its totient is φ = 10402631240.

The previous prime is 20805262483. The next prime is 20805262493. The reversal of 20805262484 is 48426250802.

It can be written as a sum of positive squares in only one way, i.e., 20776339600 + 28922884 = 144140^2 + 5378^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20805262481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600657807 + ... + 2600657814.

It is an arithmetic number, because the mean of its divisors is an integer number (6068201559).

Almost surely, 2^20805262484 is an apocalyptic number.

It is an amenable number.

20805262484 is a deficient number, since it is larger than the sum of its proper divisors (15603946870).

20805262484 is a wasteful number, since it uses less digits than its factorization.

20805262484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201315625 (or 5201315623 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 41.

The spelling of 20805262484 in words is "twenty billion, eight hundred five million, two hundred sixty-two thousand, four hundred eighty-four".