18121099330 has 16 divisors (see below), whose sum is σ = 34334714880. Its totient is φ = 6866942832.

The previous prime is 18121099313. The next prime is 18121099331. The reversal of 18121099330 is 3399012181.

It is a self number, because there is not a number n which added to its sum of digits gives 18121099330.

It is not an unprimeable number, because it can be changed into a prime (18121099331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47686914 + ... + 47687293.

It is an arithmetic number, because the mean of its divisors is an integer number (2145919680).

Almost surely, 2^18121099330 is an apocalyptic number.

18121099330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18121099330 is a deficient number, since it is larger than the sum of its proper divisors (16213615550).

18121099330 is a wasteful number, since it uses less digits than its factorization.

18121099330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95374233.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 18121099330 in words is "eighteen billion, one hundred twenty-one million, ninety-nine thousand, three hundred thirty".