20155340046563 has 2 divisors, whose sum is σ = 20155340046564. Its totient is φ = 20155340046562.

The previous prime is 20155340046551. The next prime is 20155340046571. The reversal of 20155340046563 is 36564004355102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20155340046563 - 2¹⁴ = 20155340030179 is a prime.

It is a super-2 number, since 2×20155340046563² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20155340046463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077670023281 + 10077670023282.

It is an arithmetic number, because the mean of its divisors is an integer number (10077670023282).

Almost surely, 2^{20155340046563} is an apocalyptic number.

20155340046563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155340046563 is an equidigital number, since it uses as much as digits as its factorization.

20155340046563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 20155340046563 in words is "twenty trillion, one hundred fifty-five billion, three hundred forty million, forty-six thousand, five hundred sixty-three".