20550330511 has 2 divisors, whose sum is σ = 20550330512. Its totient is φ = 20550330510.

The previous prime is 20550330391. The next prime is 20550330527. The reversal of 20550330511 is 11503305502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20550330511 - 2⁹ = 20550329999 is a prime.

It is a super-2 number, since 2×20550330511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20550330011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275165255 + 10275165256.

It is an arithmetic number, because the mean of its divisors is an integer number (10275165256).

Almost surely, 2^20550330511 is an apocalyptic number.

20550330511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550330511 is an equidigital number, since it uses as much as digits as its factorization.

20550330511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 20550330511 in words is "twenty billion, five hundred fifty million, three hundred thirty thousand, five hundred eleven".