18314082981 has 12 divisors (see below), whose sum is σ = 26518359660. Its totient is φ = 12179534400.

The previous prime is 18314082979. The next prime is 18314082989. The reversal of 18314082981 is 18928041381.

It can be written as a sum of positive squares in 2 ways, for example, as 17784622881 + 529460100 = 133359^2 + 23010^2 .

It is not a de Polignac number, because 18314082981 - 2¹ = 18314082979 is a prime.

It is a super-2 number, since 2×18314082981² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18314082989) 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 in 11 ways as a sum of consecutive naturals, for example, 2483970 + ... + 2491331.

It is an arithmetic number, because the mean of its divisors is an integer number (2209863305).

Almost surely, 2^18314082981 is an apocalyptic number.

It is an amenable number.

18314082981 is a deficient number, since it is larger than the sum of its proper divisors (8204276679).

18314082981 is a wasteful number, since it uses less digits than its factorization.

18314082981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975716 (or 4975713 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 18314082981 in words is "eighteen billion, three hundred fourteen million, eighty-two thousand, nine hundred eighty-one".