20653336441 has 4 divisors (see below), whose sum is σ = 20936258932. Its totient is φ = 20370413952.

The previous prime is 20653336439. The next prime is 20653336463. The reversal of 20653336441 is 14463335602.

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 12625893225 + 8027443216 = 112365^2 + 89596^2 .

It is a cyclic number.

It is not a de Polignac number, because 20653336441 - 2¹ = 20653336439 is a prime.

It is a super-2 number, since 2×20653336441² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20653336441.

It is not an unprimeable number, because it can be changed into a prime (20653306441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141461136 + ... + 141461281.

It is an arithmetic number, because the mean of its divisors is an integer number (5234064733).

Almost surely, 2^20653336441 is an apocalyptic number.

It is an amenable number.

20653336441 is a deficient number, since it is larger than the sum of its proper divisors (282922491).

20653336441 is an equidigital number, since it uses as much as digits as its factorization.

20653336441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282922490.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 20653336441 in words is "twenty billion, six hundred fifty-three million, three hundred thirty-six thousand, four hundred forty-one".