20555530001 has 2 divisors, whose sum is σ = 20555530002. Its totient is φ = 20555530000.

The previous prime is 20555529971. The next prime is 20555530043. The reversal of 20555530001 is 10003555502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11411580625 + 9143949376 = 106825^2 + 95624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20555530001 is a prime.

It is a super-2 number, since 2×20555530001² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20555530081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277765000 + 10277765001.

It is an arithmetic number, because the mean of its divisors is an integer number (10277765001).

Almost surely, 2^20555530001 is an apocalyptic number.

It is an amenable number.

20555530001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20555530001 is an equidigital number, since it uses as much as digits as its factorization.

20555530001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 26.

The spelling of 20555530001 in words is "twenty billion, five hundred fifty-five million, five hundred thirty thousand, one".