18089981002 has 16 divisors (see below), whose sum is σ = 27196734600. Its totient is φ = 9024422400.

The previous prime is 18089980981. The next prime is 18089981017. The reversal of 18089981002 is 20018998081.

It is a Cunningham number, because it is equal to 134499²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 15205109481 + 2884871521 = 123309^2 + 53711^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2555524 + ... + 2562592.

Almost surely, 2^18089981002 is an apocalyptic number.

18089981002 is a deficient number, since it is larger than the sum of its proper divisors (9106753598).

18089981002 is a wasteful number, since it uses less digits than its factorization.

18089981002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9801.

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 18089981002 in words is "eighteen billion, eighty-nine million, nine hundred eighty-one thousand, two".