20018672027 has 2 divisors, whose sum is σ = 20018672028. Its totient is φ = 20018672026.

The previous prime is 20018671927. The next prime is 20018672041. The reversal of 20018672027 is 72027681002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20018672027 is a prime.

It is not a weakly prime, because it can be changed into another prime (20018672077) 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, 10009336013 + 10009336014.

It is an arithmetic number, because the mean of its divisors is an integer number (10009336014).

Almost surely, 2^20018672027 is an apocalyptic number.

20018672027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018672027 is an equidigital number, since it uses as much as digits as its factorization.

20018672027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 20018672027 in words is "twenty billion, eighteen million, six hundred seventy-two thousand, twenty-seven".