20555557009033 has 2 divisors, whose sum is σ = 20555557009034. Its totient is φ = 20555557009032.

The previous prime is 20555557009007. The next prime is 20555557009067. The reversal of 20555557009033 is 33090075555502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19257422635584 + 1298134373449 = 4388328^2 + 1139357^2 .

It is a cyclic number.

It is not a de Polignac number, because 20555557009033 - 2²⁵ = 20555523454601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20555557309033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277778504516 + 10277778504517.

It is an arithmetic number, because the mean of its divisors is an integer number (10277778504517).

Almost surely, 2^{20555557009033} is an apocalyptic number.

It is an amenable number.

20555557009033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20555557009033 is an equidigital number, since it uses as much as digits as its factorization.

20555557009033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3543750, while the sum is 49.

The spelling of 20555557009033 in words is "twenty trillion, five hundred fifty-five billion, five hundred fifty-seven million, nine thousand, thirty-three".