20412241985 has 4 divisors (see below), whose sum is σ = 24494690388. Its totient is φ = 16329793584.

The previous prime is 20412241981. The next prime is 20412242003. The reversal of 20412241985 is 58914221402.

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 7755091969 + 12657150016 = 88063^2 + 112504^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412241985 - 2² = 20412241981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412241981) by changing a digit.

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, 2041224194 + ... + 2041224203.

It is an arithmetic number, because the mean of its divisors is an integer number (6123672597).

Almost surely, 2^20412241985 is an apocalyptic number.

It is an amenable number.

20412241985 is a deficient number, since it is larger than the sum of its proper divisors (4082448403).

20412241985 is an equidigital number, since it uses as much as digits as its factorization.

20412241985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082448402.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 20412241985 in words is "twenty billion, four hundred twelve million, two hundred forty-one thousand, nine hundred eighty-five".