20854572485 has 8 divisors (see below), whose sum is σ = 25032213240. Its totient is φ = 16679173824.

The previous prime is 20854572439. The next prime is 20854572491. The reversal of 20854572485 is 58427545802.

It can be written as a sum of positive squares in 4 ways, for example, as 530933764 + 20323638721 = 23042^2 + 142561^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20854572485 - 2⁶ = 20854572421 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 539990 + ... + 577319.

It is an arithmetic number, because the mean of its divisors is an integer number (3129026655).

Almost surely, 2^20854572485 is an apocalyptic number.

It is an amenable number.

20854572485 is a deficient number, since it is larger than the sum of its proper divisors (4177640755).

20854572485 is a wasteful number, since it uses less digits than its factorization.

20854572485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121047.

The product of its (nonzero) digits is 3584000, while the sum is 50.

The spelling of 20854572485 in words is "twenty billion, eight hundred fifty-four million, five hundred seventy-two thousand, four hundred eighty-five".