18291091919098 has 4 divisors (see below), whose sum is σ = 27436637878650. Its totient is φ = 9145545959548.

The previous prime is 18291091919003. The next prime is 18291091919183. The reversal of 18291091919098 is 89091919019281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13634460245169 + 4656631673929 = 3692487^2 + 2157923^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572772979773 + ... + 4572772979776.

Almost surely, 2^{18291091919098} is an apocalyptic number.

18291091919098 is a deficient number, since it is larger than the sum of its proper divisors (9145545959552).

18291091919098 is an equidigital number, since it uses as much as digits as its factorization.

18291091919098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145545959551.

The product of its (nonzero) digits is 7558272, while the sum is 67.

The spelling of 18291091919098 in words is "eighteen trillion, two hundred ninety-one billion, ninety-one million, nine hundred nineteen thousand, ninety-eight".