18914756489501 has 2 divisors, whose sum is σ = 18914756489502. Its totient is φ = 18914756489500.

The previous prime is 18914756489483. The next prime is 18914756489521. The reversal of 18914756489501 is 10598465741981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17743058487001 + 1171698002500 = 4212251^2 + 1082450^2 .

It is a cyclic number.

It is not a de Polignac number, because 18914756489501 - 2¹⁰ = 18914756488477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18914756489521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9457378244750 + 9457378244751.

It is an arithmetic number, because the mean of its divisors is an integer number (9457378244751).

Almost surely, 2^{18914756489501} is an apocalyptic number.

It is an amenable number.

18914756489501 is a deficient number, since it is larger than the sum of its proper divisors (1).

18914756489501 is an equidigital number, since it uses as much as digits as its factorization.

18914756489501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87091200, while the sum is 68.

The spelling of 18914756489501 in words is "eighteen trillion, nine hundred fourteen billion, seven hundred fifty-six million, four hundred eighty-nine thousand, five hundred one".