7018493381 has 2 divisors, whose sum is σ = 7018493382. Its totient is φ = 7018493380.

The previous prime is 7018493351. The next prime is 7018493413. The reversal of 7018493381 is 1833948107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6302930881 + 715562500 = 79391^2 + 26750^2 .

It is a cyclic number.

It is not a de Polignac number, because 7018493381 - 2¹⁰ = 7018492357 is a prime.

It is a super-2 number, since 2×7018493381² = 98518498678281622322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7018493351) 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, 3509246690 + 3509246691.

It is an arithmetic number, because the mean of its divisors is an integer number (3509246691).

Almost surely, 2^7018493381 is an apocalyptic number.

It is an amenable number.

7018493381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7018493381 is an equidigital number, since it uses as much as digits as its factorization.

7018493381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 7018493381 is about 83776.4488445291. The cubic root of 7018493381 is about 1914.6142997684.

The spelling of 7018493381 in words is "seven billion, eighteen million, four hundred ninety-three thousand, three hundred eighty-one".