20553523153 has 2 divisors, whose sum is σ = 20553523154. Its totient is φ = 20553523152.

The previous prime is 20553523121. The next prime is 20553523157. The reversal of 20553523153 is 35132535502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15602008464 + 4951514689 = 124908^2 + 70367^2 .

It is a cyclic number.

It is not a de Polignac number, because 20553523153 - 2⁵ = 20553523121 is a prime.

It is a super-2 number, since 2×20553523153² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20553523157) 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 as a sum of consecutive naturals, namely, 10276761576 + 10276761577.

It is an arithmetic number, because the mean of its divisors is an integer number (10276761577).

Almost surely, 2^20553523153 is an apocalyptic number.

It is an amenable number.

20553523153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20553523153 is an equidigital number, since it uses as much as digits as its factorization.

20553523153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 34.

The spelling of 20553523153 in words is "twenty billion, five hundred fifty-three million, five hundred twenty-three thousand, one hundred fifty-three".