20653663411 has 4 divisors (see below), whose sum is σ = 20961927112. Its totient is φ = 20345399712.

The previous prime is 20653663343. The next prime is 20653663427. The reversal of 20653663411 is 11436635602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20653663411 - 2²¹ = 20651566259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653663111) 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, 154131750 + ... + 154131883.

It is an arithmetic number, because the mean of its divisors is an integer number (5240481778).

Almost surely, 2^20653663411 is an apocalyptic number.

20653663411 is a deficient number, since it is larger than the sum of its proper divisors (308263701).

20653663411 is an equidigital number, since it uses as much as digits as its factorization.

20653663411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308263700.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 20653663411 in words is "twenty billion, six hundred fifty-three million, six hundred sixty-three thousand, four hundred eleven".