18273837381911 has 2 divisors, whose sum is σ = 18273837381912. Its totient is φ = 18273837381910.

The previous prime is 18273837381901. The next prime is 18273837381949. The reversal of 18273837381911 is 11918373837281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18273837381911 - 2²⁶ = 18273770273047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18273837381901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9136918690955 + 9136918690956.

It is an arithmetic number, because the mean of its divisors is an integer number (9136918690956).

Almost surely, 2^{18273837381911} is an apocalyptic number.

18273837381911 is a deficient number, since it is larger than the sum of its proper divisors (1).

18273837381911 is an equidigital number, since it uses as much as digits as its factorization.

18273837381911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 62.

The spelling of 18273837381911 in words is "eighteen trillion, two hundred seventy-three billion, eight hundred thirty-seven million, three hundred eighty-one thousand, nine hundred eleven".