20153663653 has 2 divisors, whose sum is σ = 20153663654. Its totient is φ = 20153663652.

The previous prime is 20153663627. The next prime is 20153663689. The reversal of 20153663653 is 35636635102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16663453569 + 3490210084 = 129087^2 + 59078^2 .

It is a cyclic number.

It is not a de Polignac number, because 20153663653 - 2²⁵ = 20120109221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20153663623) 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 as a sum of consecutive naturals, namely, 10076831826 + 10076831827.

It is an arithmetic number, because the mean of its divisors is an integer number (10076831827).

Almost surely, 2^20153663653 is an apocalyptic number.

It is an amenable number.

20153663653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153663653 is an equidigital number, since it uses as much as digits as its factorization.

20153663653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 40.

The spelling of 20153663653 in words is "twenty billion, one hundred fifty-three million, six hundred sixty-three thousand, six hundred fifty-three".